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 cheddar, grated Parmesan, cold diced butter, chopped chives, smoked paprika, and garlic powder to the dry mixture. Work with your fingertips until the mixture resembles coarse crumbs.
04 - Drizzle in cold water one tablespoon at a time, mixing gently until the dough just comes together and holds its shape without being sticky.
05 - Turn the dough onto a lightly floured surface and roll to an even 1/8-inch thickness using a rolling pin.
06 - Cut into 2-inch squares or desired shapes using a knife or cookie cutter. Place the pieces onto the prepared baking sheet with slight spacing between them.
07 - Bake for 16 to 18 minutes until the pieces are golden brown and crisp at the edges.
08 - Transfer to a cooling rack. Serve warm or at room temperature.