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