Preheat oven to 325°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, baking powder, baking soda, and salt in a large bowl; stir with a whisk. Beat butter, sugar, almond extract, and egg with a mixer at medium speed until blended. Add flour mixture and granola; beat until well blended.
Turn dough out onto a baking sheet coated with cooking spray. Shape dough into an 11-inch-long roll; pat to 1-inch thickness. Bake at 325° for 30 minutes.
Place baking sheet on a wire rack to cool 10 minutes. Remove roll from baking sheet; cut roll diagonally into 18 (1/2- inch) slices. Place slices, cut sides up, on baking sheet. Bake at 325° for 10 minutes. Remove from baking sheet; cool completely on wire rack.