Quick Recipe Version (TL;DR)
Quick Ingredients
- Apples: 1.8 kg / 4 lb apples, peeled, cored, sliced (about 10 medium)
- Sugar + spice: 120 g (1/2 cup + 1 tbsp) granulated sugar, 50 g (1/4 cup packed) brown sugar, 2 tsp ground cinnamon, 1/4 tsp nutmeg, 1/2 tsp fine salt
- Thickener + flavor: 2 tbsp cornstarch, 2 tbsp lemon juice, 1 tsp vanilla extract
- Crumble: 250 g (2 cups) all-purpose flour, 120 g (1 1/4 cups) rolled oats, 150 g (3/4 cup packed) brown sugar, 50 g (1/4 cup) granulated sugar, 1 tsp cinnamon, 1/2 tsp salt, 170 g (12 tbsp) cold unsalted butter (cubed)
- Vanilla sauce: 480 ml (2 cups) whole milk, 120 ml (1/2 cup) heavy cream, 75 g (6 tbsp) sugar, 4 large egg yolks, 1 tbsp cornstarch, 2 tsp vanilla extract (or 1 tsp vanilla bean paste), pinch of salt
Do This
- 1) Heat oven to 190°C / 375°F. Butter a 33 x 23 cm (13 x 9 in) baking pan.
- 2) Toss apples with sugars, spices, salt, cornstarch, lemon juice, and vanilla; spread in the pan.
- 3) Rub butter into flour, oats, sugars, cinnamon, and salt until clumpy.
- 4) Scatter crumble evenly over apples (no need to press hard).
- 5) Bake 45–55 min until deep golden and bubbling at the edges; rest 15 min.
- 6) Simmer milk + cream; whisk yolks + sugar + cornstarch; temper, then cook to a thick, pourable custard. Stir in vanilla.
- 7) Spoon warm crumble into bowls and pour over vanilla sauce (or serve with ice cream).
Why You’ll Love This Recipe
- Feeds a crowd: A big tray bake that serves 10–12 comfortably.
- Classic comfort: Warm cinnamon apples under a buttery, crunchy oat topping.
- That vanilla pour: A simple homemade vanilla custard sauce that turns it into a proper dessert.
- Make-ahead friendly: Prep the topping and sauce in advance, then bake when you’re ready.
Grocery List
- Produce: 1.8 kg / 4 lb apples (firm-tart: Granny Smith, Braeburn, Honeycrisp), 1 lemon
- Dairy: unsalted butter, whole milk, heavy cream, eggs
- Pantry: all-purpose flour, rolled oats, granulated sugar, brown sugar, cornstarch, ground cinnamon, ground nutmeg (optional), vanilla extract or vanilla bean paste, fine salt
Full Ingredients
Apple Filling
- Apples: 1.8 kg / 4 lb apples, peeled, cored, sliced 1 cm thick (about 10 medium)
- Granulated sugar: 120 g (1/2 cup + 1 tbsp)
- Light or dark brown sugar: 50 g (1/4 cup packed)
- Cornstarch: 2 tbsp
- Ground cinnamon: 2 tsp
- Ground nutmeg: 1/4 tsp (optional but lovely)
- Fine salt: 1/2 tsp
- Lemon juice: 2 tbsp (from 1 lemon)
- Vanilla extract: 1 tsp
Crumble Topping
- All-purpose flour: 250 g (2 cups)
- Rolled oats: 120 g (1 1/4 cups)
- Light or dark brown sugar: 150 g (3/4 cup packed)
- Granulated sugar: 50 g (1/4 cup)
- Ground cinnamon: 1 tsp
- Fine salt: 1/2 tsp
- Unsalted butter: 170 g (12 tbsp), cold, cut into 1–2 cm cubes
Vanilla Sauce (Pourable Custard)
- Whole milk: 480 ml (2 cups)
- Heavy cream: 120 ml (1/2 cup)
- Granulated sugar: 75 g (6 tbsp)
- Egg yolks: 4 large
- Cornstarch: 1 tbsp
- Fine salt: 1 pinch
- Vanilla: 2 tsp vanilla extract or 1 tsp vanilla bean paste
To Serve (Optional)
- Extra vanilla sauce (recommended), or vanilla ice cream
Step-by-Step Instructions
Step 1: Preheat the oven and prep the pan
Set your oven to 190°C / 375°F (no fan). Lightly butter a 33 x 23 cm (13 x 9 in) baking pan (at least 5 cm / 2 in deep). If you prefer easier cleanup, you can line the pan with parchment and butter the parchment.
Tip: Put a baking sheet on the rack below to catch any drips if your pan is very full or shallow.
Step 2: Slice and season the apples
Peel, core, and slice the apples to about 1 cm thickness. Add them to a large bowl.
Sprinkle over the granulated sugar, brown sugar, cornstarch, cinnamon, nutmeg (if using), and salt. Add the lemon juice and vanilla. Toss very well until the apples look evenly coated and there are no dry pockets of cornstarch.
Tip the apples (and any syrupy bits in the bowl) into the prepared pan and spread into an even layer.
Step 3: Make the crumble topping (clumpy and buttery)
In a large bowl, mix together the flour, rolled oats, brown sugar, granulated sugar, cinnamon, and salt.
Add the cold butter cubes. Use your fingertips to rub the butter into the dry ingredients until you have a mix of small crumbs and larger clumps (think peas up to small grapes). The larger clumps are what bake up extra crunchy.
Step 4: Assemble the tray
Scatter the crumble topping evenly over the apples, covering them as completely as you can. Try not to press it down firmly; a looser scatter gives you a lighter, craggier topping.
Step 5: Bake until golden and bubbling
Bake at 190°C / 375°F for 45–55 minutes, until the topping is a deep golden brown and you see thick juices bubbling around the edges (and in a few spots near the center).
Let the crumble rest for 15 minutes before serving. This helps the apple juices thicken so you get spoonable layers instead of a runny puddle.
Step 6: Make the vanilla sauce while the crumble bakes
In a medium saucepan, combine the milk and heavy cream. Warm over medium heat until steaming and just beginning to simmer at the edges (do not let it boil hard), about 6–8 minutes.
Meanwhile, in a medium bowl whisk together the egg yolks, sugar, cornstarch, and a pinch of salt until smooth and slightly lightened, about 30–45 seconds.
Slowly pour about 240 ml (1 cup) of the hot milk mixture into the yolk mixture while whisking constantly (this tempers the eggs). Pour the warmed yolk mixture back into the saucepan, whisking.
Cook over medium to medium-low heat, whisking constantly, until the custard thickens to a pourable sauce that coats the back of a spoon, about 3–6 minutes. If you have a thermometer, aim for 82–84°C / 180–183°F.
Remove from the heat and whisk in the vanilla. If you want it ultra-smooth, strain through a fine-mesh sieve into a jug or bowl.
Step 7: Serve warm with a generous pour of vanilla sauce
Spoon warm apple crumble into bowls. Pour over warm vanilla sauce (or serve the sauce on the side so everyone can add as much as they like). This is also excellent with vanilla ice cream, or a half-and-half approach: a scoop of ice cream plus a pour of warm custard.
Pro Tips
- Choose the right apples: Use a mix of tart and sweet-firm apples (like Granny Smith + Honeycrisp). Very soft apples can turn mushy.
- Don’t skip the rest: Resting 15 minutes after baking helps the filling set so it scoops neatly.
- Clumps are your friend: Leave some larger butter-and-oat clumps in the topping for a more dramatic crunch.
- Watch the edges: If the topping is browning too fast at the 35–40 minute mark, loosely tent the pan with foil and keep baking until bubbling.
- Custard control: Keep the custard at a gentle heat and whisk constantly; boiling can cause curdling. If it thickens too much, whisk in 1–2 tbsp warm milk.
Variations
- Caramel-apple crumble: Replace 50 g of the granulated sugar in the filling with 50 g extra brown sugar, and drizzle 1–2 tbsp caramel sauce over each serving.
- Nutty topping: Add 80 g (3/4 cup) chopped walnuts or pecans to the crumble topping for extra crunch (stir in after rubbing in the butter).
- Spiced custard: Add 1/2 tsp ground cinnamon to the custard while heating the milk, then strain before serving for a subtle spiced vanilla sauce.
Storage & Make-Ahead
Store: Cool crumble completely, cover, and refrigerate for up to 4 days. Store vanilla sauce in a sealed container in the fridge for up to 3 days (it will thicken as it chills).
Reheat: Reheat crumble in a 175°C / 350°F oven for 15–20 minutes until warmed through (best for keeping the topping crisp). Microwave works for quick bowls, but the topping will soften. Rewarm vanilla sauce gently on the stovetop over low heat, stirring often, or microwave in short bursts, stirring between.
Make-ahead: Make the crumble topping up to 3 days ahead and keep it covered in the fridge. You can also make the vanilla sauce 1–2 days ahead. For best texture, slice and toss the apples right before baking.
Freeze: Bake and cool completely, then freeze (well wrapped) for up to 3 months. Thaw overnight in the fridge and reheat at 175°C / 350°F for 20–30 minutes.
Nutrition (per serving)
Approximate, based on 12 servings and including vanilla sauce: 430 calories, 17 g fat, 64 g carbohydrates, 4 g protein, 4 g fiber, 44 g sugar, 240 mg sodium.
