01 - Preheat oven to 350°F. Line a 9x13-inch baking pan with parchment paper, allowing overhang for easy removal.
02 - Combine flour, oats, granulated sugar, brown sugar, baking powder, and salt in a large bowl.
03 - Pour melted butter and vanilla extract over dry ingredients. Stir until mixture is crumbly and evenly moistened.
04 - Reserve 1 ½ cups of crumble mixture for topping. Press remaining mixture firmly into pan bottom to form crust.
05 - Toss cherries with sugar, cornstarch, lemon juice, and almond extract until evenly coated.
06 - Spread cherry mixture evenly over prepared crust.
07 - Sprinkle reserved crumble mixture evenly over cherry layer.
08 - Bake for 35-40 minutes until top is golden brown and filling is bubbling.
09 - Cool completely in pan. Lift out using parchment overhang and cut into bars.