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When you need a perfectly portioned pick-me-up (no celebration or occasion needed), you’ll love this funfetti mug cake. With rainbow sprinkles and super moist cake, it’s basically a celebration in a mug!

Spoon digging into funfetti mug cake topped with whipped cream and sprinkles
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My chocolate mug cake recipe is one of the most popular on my blog, and I’ve done a few more versions over the years, but this is the first time I’ve made one with sprinkles and cake mix. Yes, funfetti fans, this funfetti cake in a mug is for you! As a bonus, you don’t even have to buy the sprinkles because it’s made with boxed funfetti® cake mix. (Of course, you can add some extra sprinkles for a confetti-ladened cake!)

Like all of my mug cakes, this one is super moist (I know, we hate that word), soft and cake-y, and ridiculously easy. You can eat it as-is straight out of the microwave, or add frosting, whipped cream, chocolate syrup, or ice cream if you’re in the mood for a more decadent treat.

How Do You Know When a Mug Cake Is Done?

The top of the cake should feel dry, not wet, and when you poke it lightly, it should spring back. Because microwaves vary, it’s common to need to cook mug cakes a little bit longer than a minute. If yours isn’t done, continue to cook it in 15-second intervals.

Spoonful of funfetti mug cake and whipped cream


They don’t call me the mug cake queen for nothing. If you aren’t in a funfetti cake in a mug type of mood, perhaps a strawberry mug cake, espresso chocolate mug cake, or a chocolate chip mug cake might be more for you!

How to Store Leftovers

Mug cake is best eaten right away, but if you do have some left that you’d like to save, you can store it covered in the refrigerator for a day. Let it come to room temperature on the countertop for a few minutes before eating, or warm it in the microwave. Take note that if you are zapping it again in the microwave, it might end up being spongy and dense.

5 from 1 vote

Funfetti Mug Cake

Filled with rainbow sprinkles, this microwave funfetti mug cake is pure happiness and celebration in a mug!
Prep Time: 5 minutes
Cook Time: 1 minute
Total Time: 5 minutes
Servings: 1


  • 6 Tablespoons funfetti cake mix
  • 1 Tablespoon water
  • 2 Tablespoons applesauce
  • Sprinkles
  • Optional garnish: whipped cream, frosting, sprinkles, chocolate syrup
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  • Spray the inside of a microwave safe mug with non-stick spray (you want to use a mug that holds at least 8 ounces).
  • Add the cake mix, water, and applesauce to your mug.
    applesauce and water with funfetti cake mix in a white mug
  • Stir the ingredients together until smooth. (You can add sprinkles on top before baking to add a bit of color!)
    mixing funfetti cake mix, water, and applesauce together in a white mug with a metal spoon
  • Cook in the microwave at full power for 1 minute.
    funfetti mug cake cooked in a white mug
  • Allow to cool slightly before eating.
  • Garnish with whip cream, frosting or even ice cream and top with sprinkles!


Serving: 1mug cake, Calories: 367kcal, Carbohydrates: 74g, Protein: 2g, Fat: 7g, Saturated Fat: 2g, Sodium: 573mg, Potassium: 22mg, Fiber: 2g, Sugar: 48g

This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition information can vary for a variety of reasons. For the most precise nutritional data use your preferred nutrition calculator based on the actual ingredients you used in the recipe.

The default measuring system for this website is US Customary. Unit conversions are provided for convenience and as a courtesy only. While we strive to provide accurate unit conversions, please be aware that there may be some discrepancies.

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