Step 1. Using the medium side of a box grater, grate 1 cup (2 sticks/225 g) of frozen salted butter. Combine in a large bowl with 3 cups (426 g) all-purpose flour, ¼ cup (50 g) granulated sugar, and ¼ cup (49 g) light brown sugar. two teaspoons of baking powder Kosher salt from Diamond Crystal. Cover the bowl and freeze it for 15 minutes, or up to 24 hours. Step 2. Use two forks to toss the mixture, avoiding your hands (to keep it cold). You can stop once the ingredients are thoroughly combined—when the butter shreds remain whole but are fully coated in flour and sugar, distributed evenly around the bowl.
