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. 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 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 until the edges are deeply golden and the pieces are crisp throughout.
08 - Transfer the baked pieces to a wire rack to cool. Serve warm or at room temperature.