In one bowl, whisk together the dry ingredients for the classic waffle batter. In a separate bowl, whisk the wet ingredients. Combine until just mixed and set aside.
Prepare the red velvet batter by whisking together the dry ingredients, including cocoa powder, in one bowl and the wet ingredients with red food coloring in another. Combine until smooth.
Preheat the waffle iron according to the manufacturer’s instructions.
Pour alternating spoonfuls of the classic batter and red velvet batter onto the waffle iron. Use a skewer or knife to gently swirl the batters together to create a marble pattern.
Cook for about 5 minutes, or until the waffles are golden and fully cooked.
To make the glaze, beat the cream cheese, powdered sugar, milk, and vanilla until smooth.
Serve the red velvet marble waffles hot with cream cheese glaze and fresh berries if desired.