01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - In a mixing bowl, whisk together the all-purpose flour, baking powder, and fine sea salt until evenly distributed.
03 - Add the shredded sharp cheddar, grated Parmesan, cold diced butter, chopped chives, smoked paprika, and garlic powder. Work the mixture with your fingertips until it becomes crumbly and the butter is evenly dispersed.
04 - Drizzle in cold water one tablespoon at a time, gently mixing until a cohesive dough just comes together without overworking.
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 evenly to allow proper crisping.
07 - Bake for 16 to 18 minutes, or until the edges are golden brown and the centers are crisp throughout.
08 - Let the pieces cool on a wire rack. Serve warm or at room temperature.