01 - Preheat your waffle iron according to the manufacturer's instructions.
02 - In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, and salt until well blended.
03 - In a separate bowl, whisk the buttermilk, eggs, melted butter, vanilla extract, and red food coloring until fully incorporated.
04 - Pour the wet ingredients into the dry ingredients and stir gently until just combined. Do not overmix; a few small lumps are acceptable.
05 - Lightly grease the preheated waffle iron with nonstick spray or a small amount of melted butter.
06 - Pour 1/2 to 3/4 cup batter onto the hot waffle iron, close the lid, and cook for 3-5 minutes until crisp and cooked through.
07 - Repeat with remaining batter, greasing the iron between batches as needed.
08 - Serve waffles immediately with a pat of butter and warm maple syrup.