Step 1 Preheat oven to 425°F (220 degrees C). Step 2 Line a baking sheet with a silicone baking mat or parchment paper. Step 3 Whisk flour, baking powder, salt, and baking soda together in a large bowl. Step 4 Cut butter into flour mixture with a pastry blender until the mixture resembles coarse crumbs, about 5 minutes.
