Strawberry Oatmeal Crumble Bars Recipe
Introduction
These Strawberry Oatmeal Crumble Bars combine a buttery oat crust with a juicy strawberry filling, finished with a crisp crumble topping. Perfect for a sweet snack or dessert, they offer a delightful balance of textures and flavors. Let’s walk through how to make this bright, comforting treat at home.

Ingredients
- 1/2 cup unsalted butter (melted)
- 1 cup all-purpose flour
- 3/4 cup old-fashioned oats
- 1/2 cup granulated sugar
- 1/4 cup light brown sugar (packed)
- 1/2 teaspoon salt (or to taste)
- 2 cups coarsely chopped fresh strawberries
- 1/3 cup granulated sugar
- 2 tablespoons lemon juice
- 2 teaspoons cornstarch
Instructions
- Step 1: Preheat the oven to 350°F. Line an 8-inch square pan with aluminum foil and spray with cooking spray for easy cleanup. Set aside.
- Step 2: In a microwave-safe bowl, melt the butter, about 1 minute on high power.
- Step 3: Add the flour, oats, granulated sugar, brown sugar, and salt to the melted butter. Stir until combined into a dry, sandy mixture with some larger crumble pieces.
- Step 4: Set aside 1 heaping cup of this mixture to use as the crumble topping later.
- Step 5: Press the remaining mixture firmly and evenly into the prepared pan using a spatula or your fingers to form the crust. Set aside.
- Step 6: In the same mixing bowl, combine the chopped strawberries, 1/3 cup granulated sugar, lemon juice, and cornstarch. Toss until the ingredients are mixed well, even if the sugar hasn’t fully dissolved.
- Step 7: Spread the strawberry mixture evenly over the crust in the pan.
- Step 8: Sprinkle the reserved crumble topping evenly over the strawberries. For bigger crumble pieces, squeeze the mixture gently in your palm before sprinkling.
- Step 9: Bake the bars for about 50 minutes, or until the edges are set and golden and the center is just set. The strawberry filling should bubble around the edges. If the strawberries are very juicy, baking may take longer—watch the bars rather than the clock.
- Step 10: Remove the pan from the oven and place it on a wire rack. Allow the bars to cool completely for at least 1 hour before slicing to prevent them from falling apart.
Tips & Variations
- Use slightly underripe strawberries for less juicy filling and firmer bars.
- Swap half of the strawberries for raspberries or blueberries for a mixed berry version.
- Chill the bars in the refrigerator before cutting for cleaner slices.
- Add a teaspoon of vanilla extract to the strawberry mixture for extra flavor.
- For a nutty twist, sprinkle chopped pecans or walnuts into the crumble topping.
Storage
Store the bars in an airtight container at room temperature for up to 2 days or refrigerate for up to 5 days. To reheat, warm briefly in a microwave or oven. These bars also freeze well—wrap tightly and freeze for up to 2 months, thawing overnight in the fridge before enjoying.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use frozen strawberries instead of fresh?
Frozen strawberries can be used if fresh aren’t available, but they will release more liquid. Thaw and drain any excess moisture before mixing to help prevent sogginess.
How do I prevent the bars from being too soggy?
Make sure to use cornstarch in the strawberry filling to thicken juices and bake until you see the filling bubbling around the edges. Also, allowing the bars to cool completely before cutting helps them set firmly.
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Strawberry Oatmeal Crumble Bars Recipe
- Total Time: 1 hour 10 minutes + 1 hour cooling
- Yield: 9 servings 1x
Description
Delicious Strawberry Oatmeal Crumble Bars featuring a buttery oat crust topped with a fresh strawberry layer and a crispy crumble topping. Perfect as a snack or dessert, these bars offer a wonderful combination of tender fruit and crunchy texture, baked to golden perfection.
Ingredients
Crust and Crumble Topping
- 1/2 cup unsalted butter (melted)
- 1 cup all-purpose flour
- 3/4 cup old-fashioned oats
- 1/2 cup granulated sugar
- 1/4 cup light brown sugar (packed)
- 1/2 teaspoon salt (or to taste)
Strawberry Layer
- 2 cups coarsely chopped fresh strawberries
- 1/3 cup granulated sugar
- 2 tablespoons lemon juice
- 2 teaspoons cornstarch
Instructions
- Prepare Pan and Preheat Oven: Preheat your oven to 350°F (175°C). Line an 8-inch square pan with aluminum foil and spray it with cooking spray to ensure easy cleanup and prevent sticking.
- Melt Butter: In a large microwave-safe bowl, melt the unsalted butter by microwaving it for about 1 minute on high power until fully melted.
- Make Crust Mixture: To the melted butter, add the all-purpose flour, old-fashioned oats, granulated sugar, light brown sugar, and salt. Stir thoroughly until the mixture forms a dry, sandy texture with some larger crumble pieces.
- Reserve Crumble Topping: Take 1 heaping cup of the mixture and set it aside; this will be used later as the crumble topping.
- Form Crust in Pan: Transfer the remaining mixture to the prepared pan. Using a spatula or clean fingers, hard-pack the mixture evenly to form a smooth, firm crust. Set aside.
- Prepare Strawberry Filling: In the same mixing bowl, combine the coarsely chopped fresh strawberries, granulated sugar, lemon juice, and cornstarch. Toss well to blend all ingredients evenly.
- Assemble Bars: Evenly spread the strawberry mixture over the prepared crust layer in the pan.
- Add Crumble Topping: Evenly sprinkle the reserved crumble topping mixture over the strawberry layer. For larger crumble pieces, gently squeeze the topping mixture in your palm before sprinkling.
- Bake: Bake the assembled bars for approximately 50 minutes. Bake until the edges are set and the center has just set, with the crumble topping appearing pale golden and the strawberry filling bubbling along the edges. Bars may require up to 55 minutes if strawberries are very juicy; monitor for doneness rather than relying strictly on time.
- Cool and Serve: Remove the pan from the oven and place it on a wire rack to cool completely for at least 1 hour. Cooling fully is essential to allow the bars to set properly for clean slicing and serving without crumbling apart.
Notes
- Using fresh strawberries provides the best flavor and texture for these bars.
- Line the pan with foil for easy removal and cleaning.
- Allow bars to cool completely before slicing to prevent them from falling apart.
- For a crunchier topping, squeeze the crumble mixture in your hands before sprinkling to form larger clusters.
- If strawberries are very juicy, baking time may need to be extended to ensure proper set.
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: strawberry bars, oatmeal crumble bars, crumble topping dessert, baked strawberry dessert, easy dessert bars

