01 - Preheat your waffle iron according to manufacturer's instructions.
02 - In a large bowl, whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt until well blended.
03 - In a separate bowl, beat the eggs, then add buttermilk, melted butter, vanilla extract, and red food coloring. Mix until smooth and uniform.
04 - Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix; a few small lumps are acceptable for tender waffles.
05 - Lightly grease the preheated waffle iron with nonstick cooking spray or a small amount of melted butter.
06 - Pour approximately 1/2 to 2/3 cup of batter into the waffle iron. Cook according to your iron's instructions until waffles are crisp and cooked through, about 3–5 minutes.
07 - Serve waffles immediately while warm, topped generously with maple syrup. Add whipped cream and fresh berries if desired.