01 - Preheat oven to 375°F and line a baking sheet with parchment paper.
02 - In a mixing bowl, whisk together the flour, baking powder, and sea salt until evenly distributed.
03 - Add the cheddar, Parmesan, cold diced butter, chives, smoked paprika, and garlic powder to the dry mixture. Rub with fingertips until the mixture resembles coarse, crumbly crumbs.
04 - Drizzle in cold water one tablespoon at a time, gently mixing until the dough just comes together and holds without being sticky.
05 - Turn the dough onto a lightly floured surface and roll out to approximately 1/8-inch thickness. Cut into 2-inch squares or desired shapes using a knife or cookie cutter.
06 - Transfer the cut pieces to the prepared baking sheet, spacing them slightly apart for even crisping.
07 - Bake for 16 to 18 minutes until the edges are golden and the tops are crisp and lightly browned.
08 - Let the snacks cool on a wire rack. Serve warm or at room temperature.