01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - In a bowl, whisk together the flour, baking powder, and sea salt.
03 - Add the cheddar, Parmesan, cold butter, chives, smoked paprika, and garlic powder. Rub in with your fingertips until the mixture resembles coarse crumbs.
04 - Drizzle in cold water one tablespoon at a time, mixing gently until the dough just comes together and holds its shape.
05 - Turn the dough out onto a lightly floured surface and roll to about 1/8-inch thickness. Cut into 2-inch squares or desired shapes.
06 - Transfer the cut pieces to the prepared baking sheet, spacing them slightly apart.
07 - Bake for 16 to 18 minutes until the edges are golden and the squares are crisp throughout.
08 - Let cool on a wire rack. Serve warm or at room temperature.