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The topping turns golden before the apples are ready, so I watch for two things at once: bubbles breaking around the edges and a knife sliding easily into the fruit. That’s the moment this Jamie Oliver apple crumble is ready to come out of the oven. The apples soften underneath a crisp, buttery layer, and the filling thickens as it rests.

I toss the fruit right in the baking dish with sugar, lemon juice, cinnamon, and cornstarch, then scatter the oat topping over it. There’s no saucepan to wash and no need to cook the apples first. The topping should have little pea-size clumps before it goes on; those uneven bits bake into a mix of crisp edges and tender crumbs. After a 15-minute rest, each spoonful brings together soft apples and a golden oat crust.

Why the Apples Go Straight Into the Baking Dish

There’s no need to soften the apples on the stove before baking. They go into the dish raw, tossed with the sugar, lemon juice, cinnamon, and cornstarch, so the fruit and its juices stay right where the crumble will bake. That makes this a practical one-dish filling: you don’t have to transfer hot apples or leave a sweet, spiced syrup behind in a saucepan.

The apples release moisture as they cook. The cornstarch thickens that liquid in the oven, while the topping browns above it. The edges bubbling is a useful sign that the filling has heated through, but it’s not the only cue to check. A knife should slide easily into an apple slice; if the top is already golden and the fruit still resists, give it more time in the oven. The 45-to-55-minute range allows for differences in the apples and in how quickly an oven heats, so use the fruit’s tenderness as your final check.

Cutting the apples into even half-inch slices helps them soften at a similar pace. If some pieces are much thicker than others, the thinner ones can collapse before the thickest pieces are tender.

What Gives the Filling Its Balance and the Topping Its Crumble

• Tart-sweet apples — Choose firm apples with enough tartness to balance the sugary topping. Fresh, sound fruit matters more than choosing an expensive variety; very soft apples are more likely to lose their shape as they bake. Peel, core, and slice them evenly before mixing.
• Cornstarch and lemon juice — Cornstarch gives the fruit juices a thicker, spoonable consistency, while lemon juice keeps the filling from tasting flat and overly sweet. Fresh lemon juice is a nice choice, but bottled juice works here too. Keep both in the filling rather than trying to replace the thickener with extra flour, which can leave the juices cloudy or pasty.
• Ground cinnamon — It brings warm spice through the apple layer without competing with the fruit. Use a fresh-smelling jar; old cinnamon loses its aroma, and there isn’t a separate spice blend in this topping to cover for it.
• All-purpose flour and old-fashioned rolled oats — Flour gives the topping structure, and rolled oats make the baked crumbs more distinct and hearty. Store-brand flour and oats work well; the old-fashioned shape is what gives the topping its texture, so quick oats won’t produce quite the same result.
• Light brown sugar — Its molasses notes suit the warm cinnamon and browned topping. Pack it into the measuring cup so the amount is consistent, and break up any hard lumps before mixing.
• Cold unsalted butter — Cold butter creates the small clumps that bake into a crumbly top instead of blending into a smooth paste. Unsalted butter lets the measured kosher salt do its job. The butter doesn’t need to be a specialty brand; its temperature and small cube size matter more.

From Even Apple Slices to a Crisp, Golden Top

Coat the apples in the baking dish

Heat the oven to 375°F and lightly coat a 9-inch square baking dish with cooking spray. Peel, core, and slice the apples into half-inch pieces, then toss them in the dish with the granulated sugar, cornstarch, lemon juice, and cinnamon. Mix until the fruit is coated, then spread it into an even layer. An even layer gives the topping a steady surface and helps the apple pieces bake together.

Work the cold butter into the dry mix

Stir the flour, oats, brown sugar, and kosher salt together in a medium bowl. Add the cold, cubed butter and work it in with your fingertips until you see pea-size clumps. Stop when those clumps form; if you keep rubbing, the butter warms and the mixture turns finer and less crumbly. Keep the topping loose rather than pressing it into a solid layer.

Cover the fruit and bake until it bubbles

Scatter the topping evenly over the apples so the fruit is covered from edge to edge. Bake for 45 to 55 minutes, watching for a golden top and filling bubbling at the edges. Color alone doesn’t tell you whether the apples are tender, so slide a knife into the fruit. When it moves through easily, the crumble is ready.

Let the filling settle before serving

Take the dish out of the oven and leave the crumble to rest for 15 minutes. The filling will be extremely hot straight from the oven, and the short wait also gives it time to settle. Scoop through the crisp top and down into the soft apples when you serve it.

Three Easy Ways to Change the Crumble Without Losing Its Character

Questions That Come Up While the Crumble Bakes

Jamie Oliver Apple Crumble

Jamie Oliver apple crumble pairs tender cinnamon apples with a crisp, buttery oat topping. Bake it until the topping is golden and the filling bubbles at the edges, then rest for 15 minutes before serving.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 55 minutes mins

resting 15 minutes mins

Total Time 1 hour hr 30 minutes mins

Servings: 8 servings

Course: Dessert

Cuisine: British

Calories: 330

Ingredients Equipment Method Notes

Ingredients

  

For the filling

• 1 tsp nonstick cooking spray
• 2.5 lb apples tart-sweet, peeled, cored, and cut into 1/2-inch slices
• 0.33 cup granulated sugar
• 1 tbsp cornstarch
• 1 tbsp lemon juice
• 1 tsp ground cinnamon

For the topping

• 1 cup flour all-purpose
• 0.5 cup oats old-fashioned rolled
• 0.5 cup brown sugar packed, light
• 0.25 tsp salt kosher
• 8 tbsp unsalted butter 1 stick, cold, cut into small cubes

Equipment

• 1 9-inch square baking dish

Method

 

Prepare the filling

1. Heat the oven to 375°F.
2. Lightly coat a 9-inch square baking dish with the cooking spray.
3. Toss the apples with the granulated sugar, cornstarch, lemon juice, and cinnamon in the baking dish.
4. Spread the apples into an even layer.

Make the topping and bake

1. Combine the flour, oats, brown sugar, and salt in a medium bowl.
2. Work in the cold butter with your fingertips until the mixture forms pea-size clumps.
3. Scatter the topping evenly over the apples.
4. Bake for 45 to 55 minutes, until the topping is golden and the filling bubbles at the edges; a knife should slide easily into the apples.
5. Let the crumble rest for 15 minutes before serving.

Notes

For the best crumbly topping, keep the butter cold while working it into the flour mixture. Refrigerate leftovers for up to 4 days; freeze for up to 3 months. For a dairy-free version, use a firm dairy-free butter in place of the unsalted butter.