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 resembles coarse, crumbly crumbs.
04 - Drizzle in cold water one tablespoon at a time, gently mixing until the dough just comes together and holds its shape. Avoid overworking.
05 - Turn the dough onto a lightly floured surface and roll it out to an even 1/8-inch thickness.
06 - Cut the dough into 2-inch squares or desired shapes using a knife or cookie cutter. Place the pieces onto the prepared baking sheet, spacing them slightly apart.
07 - Bake for 16 to 18 minutes, rotating the sheet halfway through, until the edges are golden and the centers are crisp.
08 - Transfer the baked pieces to a wire cooling rack. Serve warm or at room temperature, plain or with your preferred dip.