01 - Bring your waffle iron to temperature by following manufacturer guidelines.
02 - In a large bowl, blend flour, baking powder, sugar, baking soda, and salt until evenly distributed.
03 - Incorporate cold cubed butter into the dry mixture using a pastry cutter or fingertips until the texture resembles coarse crumbs.
04 - In a separate bowl, vigorously whisk together buttermilk and eggs until combined.
05 - Pour the buttermilk and egg mixture into the dry ingredients. Fold gently to integrate; avoid overmixing for tender texture.
06 - Add shredded cheddar, diced jalapeños, and fresh chives (if using). Fold gently to distribute evenly throughout the batter.
07 - Lightly grease waffle iron with oil or nonstick spray.
08 - Spoon an appropriate amount of batter onto the preheated iron, covering the surface. Close and cook for 4 to 5 minutes until golden brown and crisp.
09 - Remove cooked waffles and serve immediately. Optionally top with butter or honey.