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 over the dry mixture. Stir until evenly moistened and crumbly.
04 - Reserve 1 ½ cups of the crumble for topping. Press remaining mixture firmly into the pan bottom.
05 - Toss cherries with sugar, cornstarch, lemon juice, and almond extract until well coated.
06 - Spread cherry mixture evenly over the pressed crust.
07 - Sprinkle reserved crumble mixture uniformly over the cherry layer.
08 - Bake for 35-40 minutes until top is golden brown and filling bubbles around edges.
09 - Cool completely in pan. Lift out using parchment and cut into bars.