Mug Cakes & Meals

1 Minute Microwave Rainbow Mug Cake

4.40 from 28 votes
Easily create a beautiful and delicious Rainbow Mug Cake in minutes! You'll enjoy a sweet, moist cake you can make with any colors you like.
Rainbow Mug Cake - Make this cake in the Microwave in MINUTES!

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Hi Bold Bakers!

What is it about rainbow that is just so exciting? Whether it’s Rainbow Cookies, Rainbow Cakes or Rainbow Ice Cream, there really is something about these vibrant fun foods that actually make them taste better! That’s why I’ve taken the rainbow one step farther. I could not be more excited to share with you one of my most fun recipes to date for Rainbow Microwave Mug Cake!

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This Rainbow Microwave Mug Cake is nothing short of magic. From all of its fun colors to delicious flavor this mug cake goes above and beyond. And I haven’t even mentioned the best part–it cooks in the microwave in only ONE MINUTE.

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If you’re anything like me you’ll find this Rainbow Microwave Mug Cake to be irresistible. All the classic ingredients in your favorite vanilla cake are combined with super fun and bright food coloring. After a quick spoon into your favorite mug and a flash in the microwave you are left with this super exciting treat. You will have to see this for yourself! Enjoy!

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Get almost 100 more Mug Recipes on Gemma’s Mug Meals Collection page!

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Rainbow Mug Cake Recipe

4.40 from 28 votes
Easily create a beautiful and delicious Rainbow Mug Cake in minutes! You'll enjoy a sweet, moist cake you can make with any colors you like.
Author: Gemma Stafford
Servings: 2 -3 mug cakes
Prep Time 5 minutes
Cook Time 1 minute
Total Time 6 minutes
Easily create a beautiful and delicious Rainbow Mug Cake in minutes! You'll enjoy a sweet, moist cake you can make with any colors you like.
Author: Gemma Stafford
Servings: 2 -3 mug cakes

Ingredients

  • ½ cup (100g) sugar
  • 1 sticks (100g) butter, softened at room temperature
  • 2 eggs at room temperature , lightly beaten
  • 1 teaspoons vanilla extract
  • 1 cups (110g/ 4oz) All purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • pinch salt
  • red , orange, yellow, green, blue, food colouring

Instructions

  • In a large bowl cream the sugar and butter together until light in colour and fluffy in texture - about 3 minutes. Use a hand whisk.
  • Crack in an egg, mix in well, and follow with the next egg. Then pour in the vanilla extract. Beat for another minute until well combined.
  • Add in the dry ingredients until just combined - don't over-mix!
  • Divide the mixture as evenly as you can between 5 bowls.
  • Add a couple of drops of food colouring to each bowl and mix very gently - again, do not over-mix!
  • Spoon the colors between the 4 mugs one spoonful at a time. Lay the different colored cake batter on top to create a marbled effect.
  • Microwave for 45 seconds (every microwave is different so cooking may vary).
  • Take care not to overcook the cake or it will dry out fast.
  • Decorate your cake with my cream cheese frosting

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Estrella07
3 years ago

Thanks Gemma for this awesome recipe. My daughters love this Rainbow Mug Cake so dearly..God bless u more..

Hayaa J.
Hayaa J.
4 years ago

I’m always making mug meal cakes and they always work! They’re amazing! But when i tried this rainbow cake, it didn’t turn into cake. It just kept it’s batter form. But i did use gluten free flour and i cut the recipe in half so i was wondering if the gluten free flour made a difference.

Bintu Yusof
5 years ago

Hi…. my son and daughters first attempted bake rainbow cake and they love it so much! My daughter told me the cake was fluffy ,bouncy and tasty!
I tried to upload the photo but failed. Will try again later.

???? from Singapore….

Sonali Trivedi
5 years ago

Hi Gemma,

Big fan of your all your recipes especially microwave recipes, I wanted to try this rainbow mug cake as proper full batch cake (6” cake maybe) in microwave I know you have show this recipe for cake as well, but I think this recipe is even better and simpler also most imp can be done in a microwave I just wanted to know the proportions for it can you pls let me know….
Thank you in advance….!

CafeGirl
CafeGirl
5 years ago

Wow! Gemma you are amazing! I make a mug something every morning! ????

RICHARD SEAMANS
RICHARD SEAMANS
1 year ago

live alone in fl . I like to cook & bake but it’s hard to due for one I order your mug baking book and just found your you tube channel I’m diabetic so my question is can you use almond or coconut flour in place of white flour.I thank you kindly

Darshi
Darshi
2 years ago

Hi, Gemma. I’m a fan of your cake recipes.I tried your rainbow mug cake and it turned awesome, fluffy, moist and delicious. My whole family loved the look and the taste. Thank you for making my day! Even i learnt the correct time duration to bake the cake soft in microwave this time..Greetings from Srilanka

Shena Brown
Shena Brown
2 years ago

Hello i like this cake in a cup idea how ever can more than one cup bake at a time

allan
allan
3 years ago

do you have anypet/

allan
allan
3 years ago

can you add a video please?

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About Us

Meet Gemma

About Us

Meet Gemma

Hi Bold Bakers! I’m Gemma Stafford, a professional chef originally from Ireland, a cookbook author, and the creator of Bigger Bolder Baking. I want to help you bake with confidence anytime, anywhere with my trusted and tested recipes and baking tips. You may have seen one of my 500+ videos on YouTube & TikTok or as a guest judge on Nailed It! on Netflix or the Best Baker in America on Food Network. No matter your skills, my Bold Baking Team & I want to be your #1 go-to baking authority.

 

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