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Funfetti Mug Cake

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When you need a perfectly portioned pick-me-up, you’ll love this funfetti mug cake. With rainbow sprinkles and super moist cake, it’s basically happiness in a mug!

Spoon digging into funfetti mug cake topped with whipped cream and sprinkles

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 one’s 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 if sprinkles are your thing.)

Like all of my mug cakes, this one is super moist (I know, we hate that word), soft and cake-y, and ridiculously easy. And instead of calling for tablespoons of oil, it uses applesauce instead, which means it’s not as heavy as other mug cakes you might have tried in the past. 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.

Mug of funfetti cake with dollop of whipped cream and sprinkles on top, pictured with two spoons

What You’ll Need

Since this mug cake is made with cake mix, you only need a few ingredients.

  • Funfetti cake mix – I used Duncan Hines, but any brand you like will work.
  • Water
  • Applesauce – You can use ½ tablespoon of oil and 2 tablespoons of water instead.
  • Sprinkles – You don’t need to buy them if you don’t have them on hand already, but if you do have some, I recommend adding them for more color.

Ideas for Garnishes

  • Whipped cream
  • Frosting
  • Sprinkles
  • Chocolate syrup
  • Ice cream
Funfetti mug cake topped with whipped cream and sprinkles

How to Make a Funfetti Mug Cake

In less than 5 minutes, you can be enjoying a homemade mug cake! Here’s what you’ll need to do.

Prepare. Spray the inside of a microwave-safe 8-ounce mug with non-stick spray.  

Make the cake batter. Add the cake mix, water, and applesauce to the mug and stir until the mixture is smooth. If you’re using additional sprinkles, scatter them on top of the batter.

Bake. Place the mug in the microwave and heat at full power for 1 minute. Cool slightly before eating and garnish as desired.

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

Can I Make This in the Oven?

This recipe was developed for the microwave, so I haven’t tested it in the oven.

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.

Spoonful of funfetti mug cake topped with whipped cream and sprinkles
Funfetti mug cake topped with whipped cream and sprinkles

Funfetti Mug Cake

Filled with rainbow sprinkles, this microwave funfetti cake is happiness in a mug!
Prep Time: 5 minutes
Cook Time: 1 minute
Total Time: 5 minutes
Servings: 1
Author: Julie Chiou
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Ingredients 

  • 6 Tablespoons funfetti cake mix
  • 1 Tablespoon water
  • 2 Tablespoons apple sauce
  • Sprinkles
  • Optional garnish: whipped cream, frosting, sprinkles, chocolate syrup

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.

Instructions

  • 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. Stir the ingredients together until smooth. (You can add sprinkles on top before baking to add a bit of color!)
  • Bake in the microwave at full power for 1 minute.
  • Allow to cool slightly before eating.
  • Garnish with whip cream, frosting or even ice cream and top with sprinkles!

NUTRITION FACTS

Calories: 367 kcal | Carbohydrates: 74 g | Protein: 2 g | Fat: 7 g | Saturated Fat: 2 g | Sodium: 573 mg | Potassium: 22 mg | Fiber: 2 g | Sugar: 48 g

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.

Course: Dessert
Cuisine: American
Keyword: cake in a cup, easy mug cake, microwave mug cake
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