Ingredients
Equipment
Method
Prep and preheat
- Preheat oven to 350°F and line a 9x13 baking dish with parchment paper so the bars lift out easily.
Make the oatmeal crumble
- Combine old-fashioned oats, all-purpose flour, granulated sugar, brown sugar, baking powder, and salt in a large bowl.
- Cut in softened unsalted butter until the mixture resembles coarse crumbs.
- Press half of the oatmeal mixture firmly into the prepared baking dish to form an even base layer.
Make the strawberry filling
- Combine sliced fresh strawberries, granulated sugar, lemon juice, and cornstarch in a bowl.
- Spread the strawberry filling evenly over the base layer so it covers to the edges.
Assemble and bake
- Spread the remaining oatmeal mixture over the strawberries and press gently to help it adhere.
- Bake for 30-35 minutes at 350°F until the top is golden brown and the filling looks set around the edges.
Cool and serve
- Allow to cool for 15 minutes before cutting into bars so the layers hold together.
- Dust with powdered sugar before serving for a simple finishing touch.
Notes
For clean bars, cool until fully set (15 minutes works best), then lift using the parchment and slice with a sharp knife. Store covered in the refrigerator up to 4 days; freeze bars up to 2 months. For a lighter option, use half all-purpose flour and half whole-wheat flour for a nuttier crumble without changing the method.