01 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl until thoroughly incorporated.
02 - In a separate bowl, whisk buttermilk, eggs, melted butter, and vanilla extract until the mixture is smooth and uniform.
03 - Gently fold the wet mixture into the dry ingredients, mixing only until just combined. Avoid overmixing to prevent tough waffles.
04 - Divide batter evenly between two bowls. Add cocoa powder and red food coloring to one bowl, stirring until completely blended to create red velvet batter. Keep the second bowl plain for vanilla contrast.
05 - Heat waffle iron according to manufacturer guidelines. Lightly coat the cooking surface with oil or nonstick cooking spray.
06 - Drop alternating spoonfuls of red velvet and vanilla batters onto the center of the hot iron. Gently swirl with a chopstick or butter knife to create a marbled pattern.
07 - Close the lid and cook until waffles are golden brown, crisp, and completely cooked through, approximately 3 to 5 minutes per batch.
08 - Serve immediately while warm, topped with cream cheese glaze, pure maple syrup, or fresh fruit as preferred.