There is a particular kind of autumn afternoon that calls for something baked, something warm, something that fills the kitchen with the smell of caramelised sugar and spiced apple. This salted toffee apple crumble tart is exactly that recipe. The filling is soft and jammy, the toffee sauce runs in glossy ribbons between the apple slices, and the crumble on top catches every bit of golden heat from the oven until it turns wonderfully crisp. Served just barely warm with a spoonful of clotted cream or a scoop of vanilla ice cream, it is the kind of dessert people ask you for the recipe of before they have even finished their first slice.
What sets this tart apart from a standard apple crumble is the intentional layering of texture and flavour at every stage. The pastry shell is blind-baked to a proper biscuity crunch before the filling goes in, which means the base stays crisp even after baking. The toffee sauce is made separately with brown butter and dark muscovado sugar, giving it a depth that goes far beyond a simple caramel, and a generous pinch of flaky salt cuts through the sweetness in the most satisfying way. The oat crumble is enriched with ground almonds and a touch of cinnamon, which helps it clump into irregular, craggy pieces rather than a uniform dusty topping.
This is a medium-difficulty bake that rewards a little patience, particularly during the blind-baking step and when making the toffee sauce. If you are comfortable making pastry from scratch and have made a simple caramel before, you will find this entirely approachable. It is the perfect recipe for a weekend bake when you want something genuinely impressive without spending an entire day in the kitchen, and it is equally at home at a dinner party table or on a Sunday afternoon with family.
10
servings
Ingredients
- Toffee Sauce, About 8 Tbsp
- 200 gall-purpose flour (about 1 2/3 cups, spooned and leveled)
- 30 gicing sugar (powdered sugar, about 3 tbsp)
- 0.25 tspfine sea salt
- 120 gunsalted butter, cold and cubed (about 8 tbsp)
- 1 largeegg yolk
- 2 tbspice-cold water, plus more as needed
- 900 gfirm apples such as Granny Smith or Braeburn, peeled, cored, and sliced 5mm thick (about 6 medium apples)
- 2 tbspfresh lemon juice
- 50 gcaster sugar (about 1/4 cup)
- 1 tspground cinnamon
- 0.25 tspground nutmeg
- 115 gunsalted butter
- Crumble)
- 160 gdark muscovado sugar (about 3/4 cup packed)
- 120 mlheavy cream (about 1/2 cup)
- 1 tspvanilla extract
- 1 tspflaky sea salt, plus extra for finishing (such as Maldon)
- 90 grolled oats (old-fashioned oats, about 1 cup)
- 60 gall-purpose flour (about 1/2 cup
- Crumble
- 40 gground almonds (almond flour, about 1/3 cup)
- 80 glight brown sugar, packed (about 1/3 cup)
- 0.5 tspground cinnamon
- 0.25 tspfine sea salt
- Crumble)
- 90 gunsalted butter, cold and cubed (about 6 tbsp
- —Clotted cream or vanilla ice cream, to serve
Ingredient Substitutions
Instructions
🔧 Equipment
- Make the shortcrust pastry: combine 200g flour, 30g icing sugar, and 0.25 tsp fine sea salt in a large bowl. Add 120g cold cubed butter and rub together quickly with your fingertips until the mixture resembles coarse breadcrumbs with some pea-sized pieces still visible. Stir the egg yolk into 2 tbsp ice-cold water, then drizzle over the flour mixture. Use a butter knife to stir, then your hands to bring the dough together. It should be shaggy but hold when pressed. If too dry, add water a half teaspoon at a time. Shape into a disc, wrap in cling film, and refrigerate for at least 30 minutes.
- Make the salted toffee sauce: melt 115g butter in a medium heavy-bottomed saucepan over medium heat, swirling occasionally, until it foams and then turns a deep golden brown with a nutty aroma, about 5 to 6 minutes. This is brown butter and it is the key to the sauce’s depth. Add 160g dark muscovado sugar and stir well. Pour in 120ml heavy cream carefully as the mixture will bubble vigorously. Stir continuously over medium heat for 3 to 4 minutes until smooth and slightly thickened. Remove from heat, stir in 1 tsp vanilla extract and 1 tsp flaky salt. Set aside to cool to room temperature.
- Prepare the apple filling: toss the sliced apples with lemon juice, 50g caster sugar, 1 tsp cinnamon, and 0.25 tsp nutmeg in a large bowl. Set aside for 10 minutes. The apples will release some juice, which is fine.
- Make the crumble topping: combine 90g rolled oats, 60g flour, 40g ground almonds, 80g light brown sugar, 0.5 tsp cinnamon, and 0.25 tsp fine salt in a bowl. Add 90g cold cubed butter and rub in with your fingertips until the mixture clumps together in irregular pieces. Do not over-work it. Refrigerate until needed.
- Blind bake the pastry shell: preheat your oven to 375°F (190°C). On a lightly floured surface, roll the chilled pastry to about 3mm thick and large enough to line a 9-inch (23cm) fluted tart tin with a removable base. Carefully transfer the pastry to the tin, press into the edges, and trim the overhang flush with the rim. Prick the base all over with a fork. Line with parchment paper and fill with baking weights or dried beans. Bake for 15 minutes, then remove the weights and parchment and bake for a further 5 minutes until the base looks dry and pale golden. Remove from the oven.
- Assemble and bake: reduce the oven temperature to 350°F (175°C). Spoon about two-thirds of the cooled toffee sauce over the base of the blind-baked shell, spreading it into an even layer. Arrange the apple slices snugly over the toffee layer, overlapping them slightly and pressing them into an even layer. Drizzle the remaining toffee sauce over the apples. Scatter the crumble topping evenly over the apples, covering the filling completely.
- Bake for 28 to 32 minutes until the crumble is deep golden and the apple filling is bubbling at the edges. If the crumble browns too quickly, lay a sheet of foil loosely over the top for the last 10 minutes. Remove from the oven and let the tart cool in the tin on a wire rack for at least 20 minutes before slicing. Scatter with a pinch of extra flaky salt before serving. Serve warm with clotted cream or vanilla ice cream.
- Prepare the pastry, toffee sauce, apple filling, and crumble exactly as described in steps 1 through 4 of the oven method. For a 7-inch tin, you will use about two-thirds of each component. The remaining toffee sauce is excellent drizzled over ice cream.
- Blind bake the pastry shell: preheat your air fryer to 350°F (175°C) for 3 minutes. Roll and line a 7-inch fluted tart tin with removable base as described. Prick the base, line with parchment, and fill with baking weights. Place the tin carefully in the air fryer basket. Air fry for 10 minutes, then remove the weights and parchment and cook for a further 2 minutes until the base is dry and lightly golden. Watch carefully as air fryers vary. Remove and allow to cool slightly.
- Assemble the tart in the tin as described in step 6 of the oven method, using two-thirds of each component. The crumble layer should be about 1 to 1.5cm thick.
- Air fry the filled tart at 325°F (160°C) for 20 to 25 minutes until the crumble is golden and the filling is bubbling. Check at the 15-minute mark. If the crumble is browning too fast on top, lay a small square of foil gently over the surface. Do not press it down or it will stick to the crumble.
- Allow to cool in the tin for 15 minutes before carefully removing and slicing. The base will be notably crisp from the air fryer’s convection heat. Finish with flaky salt and serve warm.
- Preheat your oven to 375°F (190°C). Make the crumble topping as described in step 4 of the oven method and refrigerate. Make the toffee sauce directly in a 10-inch (25cm) oven-safe cast iron skillet: brown the butter over medium heat on the stovetop, then add the muscovado sugar, cream, vanilla, and flaky salt as described in step 2. Stir until smooth.
- Prepare the apple filling as described in step 3. Once the toffee sauce in the skillet has thickened slightly and coats a spoon, remove from the heat. Arrange the spiced apple slices directly in the toffee sauce in the skillet, fanning them out or layering them in a casual overlapping pattern. Press them in gently so they are partially submerged in the sauce.
- Scatter the cold crumble topping evenly over the apples, covering them completely. The crumble will look thick and this is correct as it bakes down slightly.
- Transfer the skillet to the oven and bake for 25 to 28 minutes until the crumble is deep golden and the toffee apple filling is bubbling enthusiastically around the edges. The caramel smell will be intense and incredible.
- Remove from the oven and rest for 10 minutes before serving directly from the skillet. Finish with a generous pinch of flaky salt. Spoon into bowls and top with vanilla ice cream, which will melt into the warm toffee sauce in the most wonderful way.
Nutrition Per Serving
Per 1 serving (makes one 9-inch (23cm) round tart)
Why This Recipe Works
Blind baking the pastry shell before adding the filling is non-negotiable for a tart with a wet filling. Apple releases a significant amount of steam during baking, and without pre-baking, the moisture would turn the base into a soft, pale disappointment. The parchment and baking weights keep the sides from slumping and the base from puffing during that initial bake, while the final 5 minutes without the weights allows the base to fully dry out and develop colour. The fork pricks are also important: they allow trapped steam from beneath the pastry to escape rather than creating bubbles.
The brown butter in the toffee sauce is doing serious flavour work. When butter is cooked past the melting point, the milk solids toast and create hundreds of new flavour compounds, including nuttiness, caramel notes, and a subtle complexity that plain melted butter simply cannot offer. Dark muscovado sugar contributes an additional layer of molasses depth that lighter sugars lack. The flaky salt is not just a garnish: salt suppresses bitterness, amplifies sweetness, and makes the toffee flavour taste more fully of itself. It is what transforms a sweet sauce into something genuinely complex.
The crumble topping is designed to clump rather than crumble into dust. Cold butter worked in with fingertips, combined with both flour and ground almonds (which contain fat and protein that bind differently to plain flour), creates clusters that bake into irregular, craggy pieces with varying levels of crunch. If you find your crumble is not clumping, work in one more tablespoon of cold butter until the mixture holds together when you press a handful. If the crumble browns too quickly during baking before the filling is hot and bubbling, the oven is running hot: use an oven thermometer to check and tent with foil as needed.
Baker’s Tips
- Keep everything cold when making the pastry. If your kitchen is warm, refrigerate the bowl and even the flour for 15 minutes before starting. Warm fat melts into the flour rather than creating the flaky layers you want.
- Slice the apples to a consistent 5mm thickness so they cook evenly. Too thick and they will be underdone; too thin and they collapse into mush. A mandoline makes this very quick.
- Do not walk away from the brown butter. It goes from golden to burnt in under a minute. Stay at the stove and watch for the foam to subside and the milk solids to turn a deep amber.
- Let the toffee sauce cool to room temperature before spreading it into the pastry shell. Hot sauce will begin to melt the pastry and make it soggy before baking even begins.
- Press the pastry firmly into the fluted edges of the tart tin. Any air pockets will cause the pastry to crack or pull away during blind baking. Run your thumb firmly along every groove.
- The tart is done when you see the filling bubbling at the edges, not just when the top looks golden. Bubbling means the internal temperature is high enough that the apples are cooked through and the toffee is properly set.
- Rest the tart for at least 20 minutes before cutting. The filling is molten immediately out of the oven and will run. Resting allows it to settle into sliceable, glossy layers.
Variations
- Pear and ginger version: replace the apples with firm Bosc pears and add 1 tsp ground ginger and 2 tbsp finely chopped crystallised ginger to the filling. Reduce bake time by 5 minutes.
- Chocolate toffee base: stir 30g finely chopped dark chocolate (70% cocoa) into the warm toffee sauce before spreading it into the shell. The chocolate sets slightly and creates a crisp layer beneath the apples.
- Boozy toffee: stir 2 tbsp of bourbon or dark rum into the toffee sauce along with the vanilla. The alcohol cooks off during baking but leaves a warm, complex flavour.
- Nut crumble variation: replace the rolled oats with an equal weight of roughly chopped pecans or walnuts for a crunchier, richer topping.
- Spiced pastry: add 0.5 tsp ground cinnamon and 0.25 tsp ground cardamom to the pastry flour for a warmly spiced shell.
Troubleshooting & FAQ
My pastry shrank down the sides of the tin during blind baking. What went wrong?
The toffee sauce seized up and became grainy instead of smooth. How do I fix it?
My crumble topping is dusty and powdery rather than clumping into chunky pieces.
The base of my tart is soggy even though I blind baked it.
The crumble is burnt on top but the filling still looks underdone. What should I do?
Storage & Make-Ahead
- Storage: Store the cooled tart loosely covered at room temperature for up to 1 day, or refrigerate for up to 3 days. The crumble will soften slightly in the fridge. Reheat individual slices in a 325°F (160°C) oven for 10 minutes or in an air fryer for 4 minutes to restore the crunch. The toffee sauce can be stored separately in a jar in the refrigerator for up to 2 weeks and gently rewarmed before use.
- Make-Ahead: The shortcrust pastry can be made up to 2 days ahead and refrigerated, or frozen for up to 1 month. The toffee sauce can be made up to 1 week ahead and refrigerated in a sealed jar. The crumble topping can be made and refrigerated up to 2 days ahead, or frozen for up to 1 month. The blind-baked shell can be prepared up to 1 day ahead and stored at room temperature, uncovered, to stay crisp.
