In a large bowl, whisk together 2 cups of all-purpose flour, 1 cup of sugar, 1 tablespoon of baking powder, 1 teaspoon of baking soda, and ½ teaspoon of salt. In another bowl, combine 1 ¾ cups of buttermilk, 2 large eggs, ½ cup of melted butter, and 1 teaspoon of pure vanilla extract. Pour the wet ingredients into the dry and stir gently until just combined—avoid overmixing for airy Red Velvet Marble Waffles.

In a separate bowl, whisk together 2 cups of all-purpose flour, 1 cup of sugar, 2 tablespoons of cocoa powder, 1 tablespoon of baking powder, 1 teaspoon of baking soda, and ½ teaspoon of salt. In another bowl, mix 1 ¾ cups of buttermilk, 1 large egg, ½ cup of melted butter, 1 teaspoon of pure vanilla extract, and 1 tablespoon of red food coloring. Combine the wet and dry ingredients, mixing gently until just combined to maintain fluffiness.

Preheat your waffle iron according to the manufacturer’s instructions for about 5 to 10 minutes. Lightly grease the waffle iron with cooking spray or melted butter.

Pour alternating spoonfuls of the classic and red velvet batters onto the center of the hot iron. Use a toothpick or knife to gently swirl the two batters together, creating a beautiful marbled pattern.

Close the waffle iron and cook according to the manufacturer's instructions, typically for around 4 to 5 minutes, or until the waffles are golden brown and crisp.

Once cooked, carefully remove the waffles from the iron and keep them warm in a low oven set to 200°F (93°C). Serve immediately with toppings like whipped cream, fresh berries, or a drizzle of maple syrup.