I make this strawberry crumble when I want a warm, jammy dessert that still feels light and summery. The berries turn saucy, the oat topping bakes up crisp, and the whole pan comes together fast with one mixing bowl and one baking dish.

Why it works
Sugar pulls juice out of the strawberries, which helps the filling turn glossy and spoonable while it bakes.
Oats and brown sugar create a crunchy topping that stays crisp even after the berries bubble underneath.

Easy One-Bowl Strawberry Crumble (Crispy Oat Topping)
- Total Time: 45
- Yield: 9 servings
- Diet: Vegetarian
Description
This easy one-bowl strawberry crumble bakes up jammy and bright with a crispy oat topping. You mix the topping, toss the berries, and bake everything in one pan for a simple summer dessert.
Ingredients
For the strawberry filling:
4 cups strawberries, hulled and sliced
1/3 cup granulated sugar
1 tbsp lemon juice
1 tbsp cornstarch
Pinch of salt
For the oat crumble topping:
1 cup old-fashioned oats
1/2 cup all-purpose flour
1/2 cup brown sugar
1/2 tsp cinnamon
1/4 tsp salt
6 tbsp unsalted butter, melted
Instructions
1. Heat oven to 350°F (175°C) and grease an 8×8-inch baking dish.
2. In a large bowl, mix oats, flour, brown sugar, cinnamon, and salt.
3. Pour in melted butter and mix until you get clumps. Set topping aside.
4. Use the same bowl to toss strawberries with granulated sugar, lemon juice, cornstarch, and a pinch of salt.
5. Spread strawberry mixture in the baking dish.
6. Sprinkle crumble topping evenly over the berries and press lightly for bigger crunchy clusters.
7. Bake 35 to 40 minutes until the filling bubbles at the edges and the topping turns deep golden.
8. Cool 10 minutes before serving.
Notes
Use fresh strawberries for the best texture.
If you use frozen strawberries, thaw and drain them first, then add 1 extra teaspoon cornstarch if the berries look very juicy.
Serve warm with ice cream, whipped cream, or lemon mousse.
- Prep Time: 10
- Cook Time: 35
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 280
- Sugar: 22g
- Sodium: 140mg
- Fat: 11g
- Saturated Fat: 7g
- Unsaturated Fat: 3g
- Trans Fat: 0g
- Carbohydrates: 44g
- Fiber: 3g
- Protein: 3g
- Cholesterol: 30mg
What you need
- Strawberries: Fresh or frozen (thaw and drain if you use frozen).
- Sugar: Granulated for the berries, brown sugar for the topping.
- Lemon: Use juice for brightness, and add zest if you want extra pop.
- Cornstarch: Thickens the filling so it does not turn watery.
- Old-fashioned oats: Give the topping that classic crumble crunch.
- Flour: Holds the topping together.
- Butter: Melted butter makes one-bowl mixing easy.
- Cinnamon + salt: Round out the flavor.
If you want a citrus twist, spoon a little Meyer Lemon Marmalade over the warm crumble right before serving.

Make it
- Heat oven to 350°F (175°C). Grease an 8×8-inch baking dish.
- Mix topping in one bowl: Stir oats, flour, brown sugar, cinnamon, and salt. Pour in melted butter and mix until you get clumps. Set topping aside.
- Use the same bowl for the filling: Add strawberries, sugar, lemon juice, cornstarch, and a pinch of salt. Toss until the berries look evenly coated.
- Pour berry mixture into the baking dish and spread it out.
- Sprinkle topping evenly over the berries and press lightly to form bigger crunchy bits.
- Bake 35 to 40 minutes until the filling bubbles at the edges and the top turns deep golden.
- Cool 10 minutes so the filling thickens before you scoop.
For a full dessert board, serve this crumble next to Meyer Lemon Bars and Fudgy Lemon Brownies Blondies for a bright summer spread.
Serve it
- Spoon warm crumble into bowls and top with vanilla ice cream, whipped cream, or a dollop of Easy Lemon Mousse.
- Add extra sliced strawberries on top for more fresh flavor.
- Prep ahead: Bake it, cool it, cover it, then reheat portions in the microwave or oven to bring the crunch back.
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