Go Back
Fresh strawberry oatmeal crumble bars ready to be served on a plate.

Strawberry Oatmeal Crumble Bars

A delicious combination of a buttery oat crust, jammy strawberry filling, and a crunchy oat crumble on top, perfect for snacks or potlucks.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 9 bars
Course: Dessert, Snack
Cuisine: American
Calories: 220
Ingredients Method Notes

Ingredients
  

For the crust and crumble
  • 1/2 cup unsalted butter, melted Use unsalted butter for better control of salt levels.
  • 1 cup all-purpose flour Plain all-purpose flour recommended for best texture.
  • 3/4 cup old-fashioned oats Do not use quick oats for best texture.
  • 1/2 cup granulated sugar For sweetness.
  • 1/4 cup light brown sugar Packed for additional sweetness.
  • 1/2 teaspoon salt Add to taste.
For the filling
  • 2 cups fresh strawberries, coarsely chopped Use ripe but firm berries for the best texture.
  • 1/3 cup granulated sugar For sweetness in the filling.
  • 2 tablespoons lemon juice For a touch of acidity.
  • 2 teaspoons cornstarch Helps thicken the filling.

Method
 

Preparation
  1. Preheat your oven to 350°F. Line an 8-inch square pan with aluminum foil and spray with cooking spray.
  2. In a large microwave-safe bowl, melt the butter about 1 minute on high power until just melted and shimmering.
Make the oat-flour mixture
  1. Add the flour, oats, granulated sugar, light brown sugar, and optional salt to the melted butter. Stir until combined.
  2. Set 1 heaping cup of the mixture aside for the crumble topping.
Form the crust
  1. Transfer the remaining mixture to the prepared pan and hard-pack it to create an even, flat crust.
Make the strawberry filling
  1. In a medium bowl, combine the chopped strawberries, 1/3 cup granulated sugar, lemon juice, and cornstarch. Stir gently to coat and let sit for 5–10 minutes.
  2. Spoon the strawberry mixture evenly over the packed crust.
Bake
  1. Sprinkle the reserved oat-crumble mixture evenly over the strawberries and bake for 30–35 minutes.
  2. Let cool on a rack until fully set before slicing.

Notes

Store cooled bars in an airtight container in the refrigerator for up to 5 days or freeze for up to 3 months. For best texture, thaw before serving.