01 -
Preheat oven to 350°F. Line an 8-inch square pan with aluminum foil and spray with cooking spray. Set aside.
02 -
In a large, microwave-safe bowl melt the butter. Add the flour, oats, sugars, and salt. Stir until mixture is dry, sandy, and forms larger crumble pieces.
03 -
Set 1 heaping cup of the crumble mixture aside for topping. Transfer the remaining mixture to the prepared pan and press firmly to create an even crust.
04 -
In a large mixing bowl, combine chopped strawberries, granulated sugar, lemon juice, and cornstarch. Toss until combined. It’s fine if the sugar hasn’t fully dissolved.
05 -
Spread the strawberry mixture evenly over the crust. Sprinkle the reserved crumble mixture on top, squeezing to form larger crumble pieces. Bake for 50–55 minutes or until the edges are set and the center is bubbling. Cool for at least 1 hour before slicing.