01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - In a mixing bowl, combine the all-purpose flour, baking powder, and fine sea salt.
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 crumbly and evenly distributed.
04 - Add cold water one tablespoon at a time, mixing gently until a cohesive dough comes together. Avoid overworking.
05 - Turn the dough onto a lightly floured surface and roll to approximately 1/8-inch thickness. Cut into 2-inch squares or desired shapes.
06 - Place the cut pieces onto the prepared baking sheet, leaving slight space between each.
07 - Bake for 16 to 18 minutes, or until the edges are golden and the pieces are crisp throughout.
08 - Transfer to a cooling rack. Serve warm or at room temperature.