Mug Cakes & Meals

1 Minute Microwave Rainbow Mug Cake

4.07 from 16 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!

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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Gemma's Rainbow Mug Cake Recipe

4.07 from 16 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 mins
Cook Time 1 min
Total Time 6 mins
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

Submit your own photos of this recipe

4 Images

jasmini

Adin

Pamela Correa

Bintu Yusof

26
Comments & Reviews

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Hayaa J.
Guest
Hayaa J.
3 months 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
Member
Bintu Yusof
1 year 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….

Member
1 year 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
Member
CafeGirl
1 year ago

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

Vin
Guest
Vin
1 year ago

Can we simply bake this like usual cupcakes. If Yes, for many minutes.

Frances
Guest
Frances
1 year ago

Hi Gemma! I was wondering what the texture of this cake is supposed to be. Is it supposed to be moist or more on the crumbly side? I cut the recipe in half and microwaved it for about a total of 65 seconds, and the cake turned out dry and crumbly. Thanks in advance for the help.

Aaleen Zahra
Guest
Aaleen Zahra
1 year ago

Hi Gemma !
I used this recipe to make a surprise for my mother and she was so surprised!
Thank you for this amazing and delicious mug cake.

HTA
Member
HTA
1 year ago

Hi, I was wondering if you knew how long to keep the mug cakes in the microwave if it’s 900 watts. I love your mug cakes but sometimes making them gets a bit challenging x.x because of the cooking time. I hope you have a good day!

kitenthehumancat
Guest

Hi I am still a kid the reason why I said that is because your recipes are so easy and delicious

Dewdrop
Member
Dewdrop
2 years ago

Can I use some substitute for egg for these mug cakes?

About Us

Meet Gemma

About Us

Meet Gemma

Hi Bold Bakers! I’m Gemma Stafford, a professional chef originally from Ireland, and I want to help you bake with confidence anytime, anywhere! No matter your skills, I have you covered. Sign up for a FREE profile and join millions of other Bold Bakers in the community for new dessert recipes, baking techniques, and more every week!

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