Mix dry and wet ingredients separately.

Combine them into a smooth batter.

Separate a portion and mix in cocoa powder.

Layer vanilla + chocolate batters with a chocolate square inside.

Bake until puffed and golden.

Variations

Nutty Center: Add a spoon of Nutella or peanut butter instead of chocolate.

White Chocolate Swirl: Use white and dark chocolate batters.

Topping Ideas: Sprinkle chocolate chips or chopped nuts before baking.

Tips

Don’t overfill the cups; ¾ full is perfect.

Use room-temperature ingredients for best texture.

Store leftovers in an airtight container for up to 3 days.

Conclusion

These marble cupcakes are a beautiful blend of vanilla and chocolate, with a gooey surprise center that makes every bite irresistible. Perfect for tea time, parties, or a cozy dessert!