01 - Preheat oven to 375°F. 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 shredded cheddar, grated Parmesan, cold diced butter, 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 the dough just comes together and holds its shape without being sticky.
05 - Turn the dough onto a lightly floured surface and roll out to an even 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, leaving a small gap between each for even crisping.
07 - Bake for 16 to 18 minutes, or until the edges are deeply golden and the centers are crisp throughout.
08 - Let the pieces cool on a wire rack. Serve warm or at room temperature, paired with a dip or on a snack platter.