01 - Preheat waffle iron according to manufacturer's instructions until ready for batter.
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 eggs thoroughly, then add buttermilk, melted butter, vanilla extract, and red food coloring. Mix until smooth and fully incorporated.
04 - Pour wet ingredients into dry ingredients and stir gently until just combined. Avoid overmixing—small lumps are acceptable and ensure tender waffles.
05 - Lightly grease waffle iron with nonstick cooking spray or a small amount of melted butter.
06 - Pour approximately 1/2 to 2/3 cup batter onto preheated waffle iron. Cook according to iron instructions until crisp and fully cooked through, typically 3 to 5 minutes.
07 - Serve immediately while warm, topped generously with maple syrup. Add whipped cream and fresh berries if desired.