01 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt until well blended.
02 - In a separate bowl, whisk together buttermilk, eggs, melted butter, and vanilla extract until smooth and fully incorporated.
03 - Gently fold the wet mixture into the dry ingredients just until combined. Take care not to overmix to maintain tender texture.
04 - Divide batter evenly between two bowls. To one bowl, add cocoa powder and red food coloring, stirring until well blended to create the red velvet batter. Keep the remaining batter plain for the vanilla portion.
05 - Preheat waffle iron according to manufacturer's instructions. Lightly grease the plates with oil or nonstick spray to prevent sticking.
06 - For each waffle, alternate spoonfuls of red velvet and vanilla batters onto the center of the hot iron. Use a chopstick or butter knife to gently swirl the batters together, creating a marbled effect.
07 - Close the lid and cook until waffles are golden brown, crisp on the outside, and cooked through, approximately 3–5 minutes per batch depending on your waffle iron.
08 - Serve warm with cream cheese glaze, maple syrup, or fresh fruit. For the glaze, mix 1/4 cup cream cheese, 2 tbsp milk, and 1/2 cup powdered sugar until smooth.