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 shredded cheddar, grated Parmesan, cold diced butter, chopped chives, smoked paprika, and garlic powder to the dry mixture. Work with your fingertips until the mixture 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 out onto a lightly floured surface and roll to an even 1/8-inch thickness. Cut into 2-inch squares or desired shapes.
06 - Transfer 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 deeply golden and the pieces are crisp throughout.
08 - Remove from the oven and let cool on a wire rack. Serve warm or at room temperature.