Sweet-tart strawberry rhubarb bars made with a buttery crust, juicy fruit filling, and golden crumble topping. Easy to make, freezer-friendly, and perfect for summer picnics, brunches, or coffee breaks.
Mix butter, brown sugar, flour, baking powder, salt, and vanilla until crumbly. Reserve 1 1/2 cups for topping.
Press remaining dough firmly into the prepared pan. Bake 10 minutes.
Stir together strawberries, rhubarb, sugar, cornstarch, and lemon zest if desired.
Spread fruit filling evenly over the crust.
Sprinkle with reserved crumble and oats.
Bake 35–40 minutes, until golden and bubbly.
Cool completely before slicing into bars.
Notes
Use gluten-free flour and certified oats to make this recipe gluten free.Add a cream cheese swirl layer for a richer variation.Bars freeze well for up to 3 months when wrapped individually.