1-Getting started with marble cupcakes: preheating your oven and gathering your tools. Begin by preheating the oven to 350°F (175°C) and lining a 12-cup muffin pan with cupcake liners to set the stage for baking success. Prep time is about 30 minutes, so it’s ideal for beginners or anyone short on time.

2-In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt to combine the dry ingredients evenly. In another bowl, melt the butter and whisk in the granulated sugar until it’s fully mixed, creating a smooth base. Add the egg, yogurt, milk, and vanilla extract to this mixture and stir well to incorporate everything.

3-Gradually mix the dry ingredients into the wet ones, stirring just until combined to keep the batter light. Divide the batter into two parts; add the cocoa powder and an extra tablespoon of milk to one portion for the chocolate flavor. Spoon alternating layers of the plain and chocolate batters into the cupcake liners, then use a toothpick to swirl them gently for that signature marbled effect.

4-Bake the cupcakes for 20 to 24 minutes, or until a toothpick inserted in the center comes out clean, with baking time adjusted for any modifications. Let them cool completely before frosting to avoid any mishaps. For more on achieving great bakes, check out our beginner baking guide to build your skills further.