Almond and Orange Sugar-Free Biscotti

Name: Almond and Orange Sugar-Free Biscotti
Prep time: 20 min
Cook time: 35 min
Total time: 1 h 30 min
Yield: approximately 24 biscotti from two logs
Cuisine: American
Ingredients: 240 g all-purpose flour (about 2 cups, spooned and leveled); 150 g granulated erythritol (about 3/4 cup; use a fine-grain brand for best results); 1 tsp baking powder; 0.25 tsp fine sea salt; 3 large eggs, at room temperature; 60 ml light olive oil or neutral vegetable oil (about 1/4 cup); 30 ml freshly squeezed orange juice (about 2 tablespoons); 0.5 tsp pure almond extract; 1 tsp pure vanilla extract; 2 tbsp finely grated orange zest (from 2 large navel oranges, packed); 150 g whole raw almonds (about 1 cup), lightly toasted

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There is something deeply comforting about the sound of a biscotti meeting the rim of a coffee cup, that quiet clink before you take the first dunked bite. These almond and orange biscotti carry all the warmth of the classic Italian bakery version: golden, impossibly crisp, studded with whole toasted almonds, and brightened with the oils of fresh orange zest. Close your eyes and you could be sitting at a small marble table somewhere in Tuscany, except these are entirely sugar-free and you can have two without a second thought.

What sets this recipe apart is the combination of erythritol as the primary sweetener and a generous amount of real orange zest rather than extract. Erythritol behaves remarkably like sugar in a dry, low-fat dough, providing structure and gentle sweetness without the cooling aftertaste it can have in richer recipes. The zest, taken from two large oranges, delivers bright, fragrant citrus oil that no bottle of extract can truly replicate. A small splash of orange juice and a half teaspoon of almond extract round things out so that every bite tastes layered and intentional, not like a compromise.

Biscotti are genuinely one of the most forgiving bakes in any home baker’s repertoire. The dough comes together in one bowl, the shaping is relaxed and rustic, and the twice-baking process is slow and low enough that you have plenty of time to watch and adjust. If you are new to sugar-free baking, this is an excellent starting point because the texture of the finished cookie is actually improved by the drier nature of erythritol. Experienced bakers will appreciate how well these hold up over time and how easily the recipe scales for gifting.

Prep: 20 minutesTotal: 1 hour 30 minutes (including cooling between bakes)Yield: approximately 24 biscotti from two logsDifficulty: ★★☆ IntermediateOccasion: Everyday Treat

✓ Vegetarian✓ Dairy-Free✓ Soy-Free✓ Sugar-Free

Servings:

24

servings

Ingredients

240 gall-purpose flour (about 2 cups, spooned and leveled)
150 ggranulated erythritol (about 3/4 cup; use a fine-grain brand for best results)
1 tspbaking powder
0.25 tspfine sea salt
3 largeeggs, at room temperature
60 mllight olive oil or neutral vegetable oil (about 1/4 cup)
30 mlfreshly squeezed orange juice (about 2 tablespoons)
0.5 tsppure almond extract
1 tsppure vanilla extract
2 tbspfinely grated orange zest (from 2 large navel oranges, packed)
150 gwhole raw almonds (about 1 cup), lightly toasted

Ingredient Substitutions

erythritol

Allulose (use the same weight, 150g): produces a slightly softer, chewier biscotti because allulose retains a little more moisture. Still excellent.
Monk fruit sweetener blended with erythritol (1:1 swap by weight): intensifies sweetness slightly, so taste the dough and reduce by 10 to 15g if you prefer a more subtle sweetness.
Coconut sugar (150g): not sugar-free but is lower glycemic than white sugar (GI around 35). Will make the biscotti darker in color with a mild caramel note.

all-purpose flour

Almond flour is not a direct swap for this recipe as it lacks gluten and will not produce a sliceable log. For a lower-carb version, use 180g all-purpose flour combined with 60g fine almond flour, and expect a slightly more crumbly texture.
A 1:1 gluten-free baking flour (same weight) works well. Add 1/4 tsp xanthan gum if your blend does not already contain it.

eggs

Flax eggs (1 tbsp ground flaxseed + 3 tbsp water per egg, rested 10 minutes): the biscotti will be slightly more fragile and may not slice as cleanly, but the flavor is good. Use for all 3 eggs if needed.

whole raw almonds

Whole hazelnuts or pecans (same weight): toast well before adding for maximum flavor.
Sliced or slivered almonds (120g): easier to slice cleanly but gives a less dramatic appearance. Reduce to 120g as they pack more densely.

orange zest

Lemon zest (same quantity): gives a brighter, more tart citrus note that pairs beautifully with almond.
1/2 tsp pure orange oil (food-grade): very concentrated, so reduce to 1/4 tsp first and taste. Omit the orange juice if using orange oil.

light olive oil

Melted unsalted butter (60g, cooled): produces a richer, slightly more tender biscotti with a classic buttery flavor.
Melted coconut oil (60ml): adds a very subtle coconut note that works surprisingly well with the orange and almond.

Instructions

🔧 Equipment

📋large rimmed baking sheet

📄parchment paper

🥣large mixing bowl

🥣medium mixing bowl or large measuring jug

🌀whisk

🍴sturdy rubber or silicone spatula

🍋Microplane or fine zester

🔪sharp serrated bread knife

🔵wire cooling rack

⚖️kitchen scale (strongly recommended)

💨air fryer (for air fryer method)

Prep: 20 minutes
Bake: 35 minutes first bake, then 20 minutes second bake
Total: 1 hour 30 minutes

Preheat your oven to 325°F (165°C). Line a large rimmed baking sheet with parchment paper. Spread the whole almonds on the sheet and toast them in the preheating oven for 10 to 12 minutes, until fragrant and lightly golden. Remove and let cool completely. Keep the oven on.
In a large bowl, whisk together the flour, erythritol, baking powder, and salt until evenly combined. Make sure there are no erythritol clumps, as they will not dissolve during baking the way sugar does.
In a medium bowl or large measuring jug, whisk together the eggs, oil, orange juice, almond extract, vanilla extract, and orange zest until smooth and well blended, about 30 seconds.
Pour the wet ingredients into the dry ingredients and stir with a sturdy spatula until a cohesive, slightly sticky dough forms. Fold in the cooled toasted almonds. The dough will be softer than a traditional biscotti dough due to erythritol’s behavior. If it feels unworkably sticky, refrigerate for 15 minutes.
Divide the dough in half. Using lightly floured hands, shape each portion into a log approximately 12 inches (30 cm) long and 2.5 inches (6 cm) wide on the prepared baking sheet, spacing them at least 3 inches apart. Pat the tops flat and smooth the sides gently.
Bake for 32 to 35 minutes, until the logs are firm to the touch, pale golden on top, and a toothpick inserted in the center comes out clean. Remove from the oven and allow to cool on the baking sheet for 25 minutes. Do not skip this cooling period — cutting the logs while they are hot will cause them to crumble because erythritol re-crystallizes as it cools and firms the structure.
Reduce oven temperature to 275°F (135°C). Using a sharp serrated bread knife, cut the logs on a slight diagonal into slices about 3/4 inch (2 cm) thick using a gentle sawing motion. Lay the slices cut-side down on the parchment-lined baking sheet.
Bake for 10 minutes, then flip each biscotti and bake for another 10 minutes, until they are dry, firm, and lightly golden on both cut sides. They will crisp further as they cool. Transfer to a wire rack and allow to cool completely before storing.

Prep: 20 minutes
Bake: 22 minutes first bake, then 12 minutes second bake
Total: 1 hour 10 minutes

This method is ideal for making a half-batch (one log, about 12 biscotti) quickly. The circulating hot air produces a beautifully even, dry crust. Work in batches during the second bake as biscotti must be laid flat.

Prepare a half-batch of the dough (halve all ingredient quantities). Toast the almonds in the air fryer basket at 300°F (150°C) for 5 to 6 minutes, shaking halfway, until fragrant. Let cool before folding into the dough.
Preheat your air fryer to 310°F (155°C) for 3 minutes. Cut a piece of parchment to fit your air fryer basket, leaving a 1-inch border so air can circulate around the edges.
Shape the dough into a single log, about 10 inches (25 cm) long and 2.5 inches (6 cm) wide, directly on the parchment. Lower it into the basket carefully.
Air fry at 310°F (155°C) for 20 to 22 minutes, checking at 18 minutes. The log should be firm on top, pale golden, and dry to the touch. Remove the basket and allow the log to cool in the basket for 20 to 25 minutes so the erythritol sets fully and the log slices cleanly.
Reduce air fryer temperature to 250°F (120°C). Slice the cooled log into 3/4-inch (2 cm) slices with a serrated knife. Lay slices flat in the basket in a single layer, working in batches. Air fry for 6 minutes, flip, then fry for another 5 to 6 minutes until dry and crisp. Cool completely on a wire rack before storing.

Prep: 20 minutes
Bake: 28 minutes first bake, then 16 minutes second bake
Total: 1 hour 20 minutes

Convection is particularly well-suited to biscotti because the fan actively dries the cookies during both bakes, producing an exceptionally crisp, even result in less time than a conventional oven.

Preheat your convection oven to 300°F (150°C). Line a large baking sheet with parchment. Toast the almonds on the sheet for 8 to 10 minutes until golden and fragrant. Cool completely. Leave the oven on.
Mix the dough as directed: whisk dry ingredients together, whisk wet ingredients separately, combine, and fold in cooled almonds. Shape into two logs, each about 12 inches (30 cm) long and 2.5 inches (6 cm) wide, spaced 3 inches apart on the baking sheet.
Bake on convection at 300°F (150°C) for 26 to 28 minutes. The fan will speed up surface drying significantly. Watch from 22 minutes onward; the logs should be firm and dry on top with a light golden color. Cool on the pan for 20 minutes.
Reduce convection oven temperature to 250°F (120°C). Slice the logs diagonally into 3/4-inch (2 cm) slices using a serrated knife. Lay cut-side down on the baking sheet.
Bake on convection for 8 minutes, flip, and bake for another 7 to 8 minutes. The fan dries the biscotti very efficiently at this stage, so check at the 7-minute mark after flipping to avoid over-browning. Cool completely on a wire rack before storing.

Nutrition Per Serving

Per 1 serving (makes approximately 24 biscotti from two logs)

98Calories

9gCarbs

0gSugar

5gFat

3gProtein

Glycemic Load4Low

Low0–10

Medium11–19

High20+

Erythritol has a glycemic index of 0 and is not metabolized in the bloodstream, so it does not raise blood sugar or insulin levels. The only glycemic contribution in this recipe comes from the small amount of all-purpose flour, which is distributed across 24 servings.

Sweetener: erythritol

Why This Recipe Works

Biscotti are unique among cookies because they are baked twice, and this is precisely what makes them the ideal vehicle for erythritol. Most sugar-free baking struggles because erythritol does not caramelize or create the same tender crumb that sucrose does, but biscotti are meant to be dry, firm, and crisp. Erythritol’s tendency to crystallize as it cools actually works in our favor here, contributing to the satisfying snap of a finished biscotti. The key is allowing the first-baked logs to cool for a full 25 minutes before slicing. During this time, the erythritol re-crystallizes throughout the dough, binding everything together and making clean slicing possible. Cut too soon and the structure is not yet set, leading to crumbling.

The oil in this recipe (rather than butter) is deliberate. Biscotti made with fat are more tender and less prone to shattering when sliced, but butter’s water content can create steam during baking, which softens the structure. Oil is 100% fat, no water, so it contributes tenderness and cohesion without interfering with the drying process of the second bake. The eggs provide both structure (from proteins in the whites) and richness (from the yolks), and at three eggs for a 24-biscotti batch, there is enough protein to hold the almonds firmly in the dough even without the crystalline lattice that sugar normally provides.

If your biscotti crumble when you slice them, there are two likely causes: the logs were not cooled long enough, or the erythritol brand you used has a very coarse grain that did not distribute evenly. A fine-grain erythritol disperses better through the dry ingredients and dissolves more readily into the egg mixture. If crumbling is a persistent problem, try chilling the shaped logs for 30 minutes before the first bake to firm them further, and always use a serrated knife with a slow, sawing motion rather than pressing straight down.

Baker’s Tips

Toast your almonds before adding them to the dough. Raw almonds taste flat and slightly bitter inside a baked cookie; toasted almonds are fragrant, crunchy, and nutty. Ten minutes at 325°F is all it takes.
Use the finest grater you have (a Microplane is ideal) for the orange zest, and press down firmly to capture the essential oils in the outermost layer of the peel. Stop before you reach the white pith, which is bitter.
Weigh your erythritol rather than measuring by volume. Different brands have different crystal sizes, which affects how it packs into a measuring cup. Weight gives you consistency every time.
If the dough feels too sticky to shape comfortably, wet your hands rather than adding extra flour. Extra flour will tighten the dough and may cause cracking during the first bake.
The slicing step is the most critical. Use a sharp serrated bread knife, a slow sawing motion, and apply very gentle downward pressure. Any rocking or rushing will crack the log rather than slice it cleanly.
Let biscotti cool completely on the wire rack before tasting. They continue to crisp and dry for 20 to 30 minutes after coming out of the oven, and eating them warm gives a false impression of softness.

Variations

Dark Chocolate Dip: Melt 60g of 85% dark chocolate (sugar-free if preferred) with 1 tsp coconut oil and dip the base of each cooled biscotti. Set on parchment until firm. Adds richness and visual appeal for gifting or special occasions.
Cranberry and Pistachio: Replace the almonds with 100g whole pistachios and 50g dried unsweetened cranberries. The sweet-tart cranberry is a beautiful contrast to the orange zest.
Espresso Almond: Add 2 tsp instant espresso powder to the dry ingredients and replace the orange juice and zest with 1 tsp pure vanilla and 1/2 tsp cinnamon. A deeply aromatic, coffee-forward biscotti.
Lavender and Lemon: Replace the orange zest with lemon zest and add 1 tsp food-grade dried culinary lavender to the dry ingredients. Elegant and floral, excellent with Earl Grey tea.

Troubleshooting & FAQ

My biscotti crumbled when I tried to slice the log. What went wrong?

The most common cause is slicing too soon. The logs must cool for at least 25 minutes after the first bake so the erythritol has time to re-crystallize and firm the structure. Also check your knife technique: use a sharp serrated knife and a gentle sawing motion. Pressing straight down will fracture the log. If crumbling is persistent, chill the baked logs for 10 minutes in the refrigerator before slicing.

My biscotti are soft and chewy after cooling, not crisp. What happened?

This usually means the second bake was not long enough, the oven temperature was too high (creating a browned outside but underdried inside), or they were stored before fully cooling. The second bake at a low temperature is specifically designed to drive out moisture slowly. If they are soft after cooling, you can return them to a 275°F (135°C) oven for another 10 minutes. Make sure they cool completely on a wire rack in a dry spot before going into a tin.

My biscotti taste slightly cooling or mentholated. Is that from the erythritol?

Yes, erythritol has a well-known cooling sensation, especially noticeable in high-moisture, high-fat recipes. In biscotti, this effect is minimal because the cookies are very dry and low in fat, but some people are more sensitive to it than others. To reduce the effect, try blending your erythritol half-and-half with allulose (keeping the total sweetener weight the same). Allulose has no cooling effect and will balance it out nicely.

The logs spread out and flattened during the first bake. How do I prevent this?

Spreading happens when the dough is too warm or too soft. Chill the shaped logs in the refrigerator for 20 to 30 minutes before baking. Also make sure you are using the full amount of flour (spooned and leveled, not scooped) and that the erythritol was measured by weight. A too-warm kitchen or slightly over-beaten eggs can also contribute. Cold, firm dough holds its shape in the oven far better.

Can I use monk fruit sweetener instead of erythritol, and do I use the same amount?

Pure monk fruit extract is extremely concentrated (many times sweeter than sugar), so you would need only a fraction of the volume. However, most retail monk fruit products are already blended with erythritol and are labeled as a 1:1 sugar substitute, which means you can use the same 150g. Check the label: if it says 1:1 sugar replacement, use the same amount. If you have pure monk fruit powder, use approximately 1 to 2 teaspoons for this entire batch and taste the dough before shaping.

Storage & Make-Ahead

Storage: Store in an airtight tin or container at room temperature for up to 3 weeks. Biscotti actually improve after the first day as they continue to dry and crisp. Do not refrigerate, as moisture from the fridge will soften them. Freeze in a zip-lock bag for up to 3 months and re-crisp in a 275°F (135°C) oven for 8 to 10 minutes.
Make-Ahead: The dough can be made up to 24 hours ahead, wrapped tightly in plastic wrap, and refrigerated as shaped logs. Bake from cold, adding 3 to 5 minutes to the first bake. Fully baked and cooled biscotti keep so well at room temperature that they are inherently a make-ahead cookie. Bake a double batch on the weekend and enjoy all week.