01 - Preheat waffle iron according to manufacturer's instructions.
02 - Whisk together flour, cocoa powder, sugar, baking powder, baking soda, and salt in a large bowl.
03 - Beat eggs in separate bowl, then add buttermilk, melted butter, vanilla extract, and red food coloring. Mix until smooth.
04 - Pour wet ingredients into dry ingredients and stir until just combined. Do not overmix; a few lumps are acceptable.
05 - Lightly grease waffle iron with nonstick spray or melted butter.
06 - Pour 1/2 to 2/3 cup batter per waffle into preheated iron. Cook according to manufacturer instructions until crisp and cooked through, approximately 3-5 minutes.
07 - Serve waffles warm, topped with maple syrup, whipped cream, and fresh berries if desired.