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Rainbow Frosted Sheet Cake

by Stacey 10 Comments

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

Rainbow Frosted Sheet Cake. Moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. A simple delicious cake.

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I’m hoping someone out there shares my love for pastel rainbows, swiss meringue buttercream and easy peasy sheet cakes that are just darn good because thats exactly what we have here today, Rainbow Frosted Sheet Cake.

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

You know what I love about a sheet cake? There’s no intimidation. Seriously, think about it for a minute. Those gorgeous decorated layer cakes (which I’m obsessed with BTW) are intimidating. They are “too beautiful to cut” or “how do you cut this?” or my favorite, “you brought it, can you cut it for everyone?”. I can tell you first hand, I can make a beautiful layered cake but that does not make me good at cutting it, lol.

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

Enter the Rainbow Frosted Sheet Cake, one layer of golden buttery vanilla cake swirled in smooth colorful swiss meringue butter cream. No special cutting requirements here, no fear of digging that knife right in and staking your claim. No fancy cake server, a plastic knife will do! No balancing acts trying to get your slice to the plate. No sooner is it cut and you’re taking the first bite!!

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

The Rainbow Frosted Sheet Cake is exactly what you’ve been looking for. Simple, delicious and beautiful!

Enjoy!

Stacey

Here are some of the products I used to make this Rainbow Frosted Sheet Cake:

  1. Nielsen Massey Vanilla Paste – There’s nothing like it and it breaks my heart when I run out! You use it just like you would extract.
  2. Wilton Food Colorings – This box includes a variety of colors that I use often.
  3. King Arthur Unbleached Cake Flour – I use King Arthur products regularly including the is flour
  4. 9×9 non-stick pan – I use this pan for everything, bar cookies, brownies you name it. Its non-stick to so I can just line it with parchment and go.

Please note some of the links above are affiliate links which means if you purchase from the link I get a small commission. I use these products and stand behind them which is why I chose to tell you about them. Thank you for your support. 

FORGOT TO PIN IT? Here you go! Thanks.

Rainbow Frosted Sheet Cake. I'm in love with this simple, moist yellow cake enrobed in a blanket of rainbow swirled swiss meringue buttercream. | thesugarcoatedcottage.com

Rainbow Frosted Sheet Cake

Rainbow Frosted Sheet Cake

Stacey Thimmes - The Sugar Coated Cottage
5 from 1 vote
Print Recipe Pin Recipe
Prep Time 25 mins
Cook Time 30 mins
Total Time 55 mins
Course Dessert
Servings 9 x9 cake

Ingredients
  

  • CAKE:
  • 1 1/2 cups cake flour
  • 1/2 cup milk
  • 1 stick butter room temp
  • 3/4 cups sugar
  • 1/2 Tbsp baking powder
  • 1/4 tsp salt
  • 2 tsp vanilla paste or extract
  • 2 large eggs room temp
  • BUTTERCREAM:
  • 3 eggs whites
  • 3/4 cups sugar
  • 2 1/2 sticks butter or 1 1/4 cup room temp, cut into Tbsp size chunks.
  • 2 tsp vanilla extract.
  • Sugar crystals for decoration optional

Instructions
 

  • CAKE:
  • Preheat oven to 350 degrees F
  • Line 9x9 pan with with parchment so it hangs over the side so you can pull the cake out once cooled.
  • Measure out flour, put in small bowl set aside.
  • Measure out milk, put in small bowl, set aside.
  • In mixing bowl add butter, sugar, baking powder, salt and vanilla.
  • Mix on med/high until light and fluffy.
  • On medium speed add in one egg at a time, mix until well combined.
  • On low speed add the milk and flour, alternating until all add. Increase speed to medium.
  • Mix until well combined.
  • Pour batter into prepared pan.
  • Bake for 30 min or until golden brown and tooth pick inserted comes out clean.
  • Cool completely.
  • BUTTERCREAM:
  • In medium sauce pan add the egg whites and sugar.
  • On medium heat you are going to whisk egg mixture until sugar is completely dissolved (you can test it by rubbing a small amount between your fingers to test it, it should be completely smooth).
  • Transfer to mixing bowl and with whisk attachment whisk on high until stiff peaks form and mixture is cooled.
  • On low speed add the butter one piece at a time. Mix until well combined.
  • Switch to paddle attachment, add vanilla, mix until smooth and glossy.
  • ASSEMBLY:
  • Divide buttercream into 6 small bowls or cups.
  • Color each cup differently, I used pink, orange, yellow, green, blue, purple by Wilton.
  • Each cup of buttercream will be divided in half, plop half of each color randomly onto cake. Repeat with the second half of the buttercream.
  • Swirl the colors and spread the buttercream with a offset spatula or regular spatula.
  • Sprinkle with sugar crystals (optional).
  • When ready cut and serve.

Notes

This recipe can be doubled and baked in a 9x13 pan, adjust bake time accordingly, about 40-45 minutes, until golden brown and toothpick inserted comes out clean.
Tried this recipe?Let us know how it was!

 

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Filed Under: Cakes/Cupcakes, Desserts, Uncategorized Tagged With: baked goods, Buttercream, cake, dessert, easy, frosting, one pan, recipe, sheet cake, simple, sprinkles, swiss meringue, vanilla, yellow cake

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Comments

  1. Pamela (BrooklynFarmGirl) says

    at

    This sheet cake is just so pretty!

    Reply
    • Stacey says

      at

      Thanks Pamela! Cant beat a good pastel rainbow 🙂 .

      Reply
  2. Katherine | Love In My Oven says

    at

    This is gorgeous, and I hear ya on the ease of sheet cakes!! The icing colors are so fun, I feel like I would love to make this for my nieces!! Have a great weekend Stacey!

    Reply
    • Stacey says

      at

      Hi Katherine! This little girls in my family flipped over this. So glad you liked it! Take care.

      Reply
  3. annie@ciaochowbambina says

    at

    5 stars
    Nothing like a beautiful sheet cake to finish a party on the right note1 This is so pretty!! 🙂

    Reply
    • Stacey says

      at

      Hi Annie! Agreed 100% and rainbow icing adds a little something extra. Take care.

      Reply
  4. Deepika|TheLoveOfCakes says

    at

    I am going to have a problem cutting that beautiful cake 😀 I love pastel hues and this frosting is so dreamy!! Love it Stacey :*

    Reply
    • Stacey says

      at

      Hi Deepika! Thanks so much! There’s nothing like seeing those colors all swirled together. Take care.

      Reply
  5. Susan @ Culinary Envy says

    at

    I just found my birthday cake for next month! This is absolutely adorable and fun! Vanilla paste…I have got to try that! Pinned!

    Reply
    • Stacey says

      at

      Hi Susan! I’m so glad you like the cake! It will be great for celebrating your birthday! Happy early B-day! Take care.

      Reply

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head-shot-100 I believe that you can create beautiful cakes from start to finish with the right process. Check out more under "About Me".

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