Marble Mug Cake
You know those days when you just need a little pick-me-up? This Marble Mug Cake is your go-to. It’s like a cozy hug in a mug, ready in minutes.

No need to wait around for hours. Just grab your ingredients, pop it in the microwave, and you’re good to go!
Ingredients for Marble Mug Cake
- 1/2 cup self-rising flour
- 1/2 cup sugar
- A pinch of salt
- 1/2 cup milk
- 1 teaspoon vanilla
- 3 tablespoons melted butter
- 1 tablespoon cocoa powder

How to Make Marble Mug Cake
- Mix the flour, sugar, and salt in a bowl.
- Add the milk, vanilla, and melted butter. Stir until combined.
- In a separate bowl, mix half of the batter with cocoa.
- Layer the plain batter and chocolate batter in a mug, alternating between the two until the mug is half full.
- Swirl the batters together with a knife to create that marble effect.
- Microwave for about 1½ minutes. The cake is done when the top is firm but not too dry.
Enjoy!
Topping Ideas
- Add a spoonful of chocolate frosting or hot fudge to make it extra decadent.
- If you have some extra time, try mixing chocolate and vanilla frostings to match the cake’s marbled look.

Try Something New
- For a fresh twist, add a spoonful of orange zest to the vanilla batter. The citrus pairs beautifully with the chocolate!
How to Make This Marble Mug Cake Vegan
- Swap regular milk for almond, soy, or oat milk.
- Use vegan butter or vegetable oil instead of dairy butter.
- Check that your sugar and chocolate are vegan-friendly.
- Follow the same steps, and you’ve got yourself a plant-based version that’s just as tasty!
Marble Mug Cake FAQs
What’s a marble mug cake?
It’s a single-serving cake that swirls vanilla and chocolate batters for a fun marbled look.
Can I use a different type of flour?
Yes! If you use all-purpose flour, just add 1 teaspoon of baking powder and 1/4 teaspoon of salt to the dry mix.
Can I make this gluten-free?
Absolutely! Use gluten-free flour and don’t forget to add baking powder and salt if it’s not self-rising.
Can I make this vegan?
Yes, simply swap the milk and butter with plant-based alternatives.
Can I add other ingredients?
Totally! Feel free to throw in some chocolate chips, nuts, or dried fruit.
How long does it take to make?
It’s super quick—about 2 minutes to mix and 3 minutes to cook.
Can I make this ahead of time?
It’s best enjoyed fresh for the ideal texture and flavor.
What can I do with leftover batter?
You can store it in the fridge for up to two days.
What should I serve this with?
Try it with ice cream, chocolate sauce, or a dusting of powdered sugar.
Can I use a bigger mug?
Yes, but you’ll need to adjust the cooking time.
What if my cake is undercooked?
Just pop it back in the microwave for an extra 30 seconds.
Can I bake it in the oven?
This recipe is made for the microwave. Baking in the oven would need adjustments.
How do I know when it’s done?
The cake should feel firm but springy to the touch, usually after 1½ minutes.
What toppings can I use?
Chocolate frosting, hot fudge, or a swirl of both chocolate and vanilla frostings work great.
Can I add other flavors?
Yes! Try mixing in some orange zest for a citrusy kick.
Is this kid-friendly?
Definitely! Kids will love swirling the batters to create the marble effect.
This Marble Mug Cake is the ultimate treat when you’re craving something sweet without the fuss.
It’s quick, easy, and delicious. Give it a try and let me know what you think! And if you’re feeling fancy, throw on some ice cream or a drizzle of chocolate sauce. Enjoy!
Marble Mug Cake - Simple Yummy Recipes

Craving a sweet treat? This marble mug cake is the perfect solution—easy to make, delicious, and ready in minutes!
Type: dessert
Cuisine: American
Keywords: Marble Mug Cake
Recipe Yield: 2 Mug Cakes
Preparation Time: PT2M
Cooking Time: PT3M
Total Time: PT5M
Recipe Ingredients:
- 1/2 cup self-rising flour
- 1/2 cup sugar
- A little bit of salt
- 1/2 cup milk
- 1 teaspoon vanilla
- 3 tablespoons melted butter
- 1 tablespoon cocoa powder
Recipe Instructions: 1. Mix flour, sugar, and salt in a bowl. 2. Add milk, vanilla, and melted butter. Stir until everything is mixed. 3. In another bowl, mix half of the batter with cocoa. 4. Put a spoon of plain batter in each mug. Then add a spoon of chocolate batter. Keep doing this until the mugs are half full. 5. Use a knife to mix the batters a little bit in each mug. This makes the marble look. 6. Microwave each mug for one and a half minutes. The cake is ready when the top feels a bit soft but not wet.
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