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Homemade Rainbow Chip Cupcakes

By // (Updated Dec 31, 2025) // 4 Comments

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Buttery and filled with rainbow chip sprinkles these rainbow chip cupcakes are delicious and topped with a gorgeous homemade buttercream and more rainbow sprinkles! Perfect for a fun birthday treat! 

Homemade Rainbow Chip Cupcake on a wood board with a blue towel and two more cupcakes in the background

Here is my version of Homemade Rainbow Chip Cupcakes, that is PERFECT! Well, in my eyes tastebuds anyways! Growing up I absolutely LOVED rainbow chip cake! I could literally eat a whole cake to myself, sadly I am not exaggerating. So, I thought it was about time for me to make some Homemade Rainbow Chip Cupcakes. 

Boy, am I sure glad I did! The cupcakes are dense and moist. Which I LOVE! I am really not a fan of light, airy cake.

Homemade Rainbow Chip Cupcake cut open with more cupcakes and a light blue towel in the background

And the rainbow chips. Well, chocolate +sprinkles = amazingness!

Homemade Rainbow Chip Cupcake piece half eaten. next to two more cupcakes and another cupcake half on a wood board with a light blue towel

These cupcakes will definitely be made plenty of times in the future. My birthday is in a few weeks, not that I really need an excuse to make cupcakes 😉

I bought these to work for St. Paddy's Day and let's just say they all disappeared, Well except for the 3 that I stuffed my face with! Oops!!!!!

This recipe is simple and one of the best homemade "white"/ "yellow" cakes I have ever tasted! I added some butter extract for delicious flavor and some cornstarch for the texture. 

★★★★★ Please let me know if you make this recipe by leaving a star rating and comment below!

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Homemade Rainbow Chip Cupcake cut open on a wood board with two more cupcakes and a blue linen in the background

Homemade Rainbow Chip Cupcakes

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Buttery and filled with rainbow chip sprinkles these cupcakes are delicious and topped with a gorgeous homemade buttercream and more rainbow sprinkles! Perfect for a fun birthday treat!

  • Total Time: 1 Hour 15 Minutes
  • Yield: 15 cupcakes 1x

Ingredients

Units Scale

Homemade Rainbow Chip Cupcakes

  • 4oz (½ Cup/ 1 stick) Unsalted Butter
  • 200 grams (1 Cup) Granulated Sugar
  • 156 grams (1 ¼ Cup) All-Purpose Flour/ Plain Flour
  • 1 Teaspoon Baking Powder
  • ½ Teaspoon Baking Soda
  • 1 Tablespoon Cornstarch
  • Pinch of Salt
  • ½ Teaspoon Butter Extract
  • 1 Large Egg, at room temp.
  • 2 Teaspoon Pure Vanilla Extract
  • 6oz (¾ Cup) Whole Milk
  • 2.5oz (⅓ Cup) Greek Yogurt/ Sour Cream
  • ½ cup rainbow chips

Frosting

  • 4oz (½ Cup/ 1 stick) Unsalted Butter, at room temp.
  • 2 Teaspoons Pure Vanilla Extract
  • 2 ½-3 cups powdered sugar
  • 2oz (¼ Cup) Heavy Whipping Cream
  • ⅓ cup rainbow chips

Instructions

Cupcakes

  1. Preheat oven to 350F and line a cupcake pan with liners. In a microwave-safe bowl microwave, melt the butter until completely melted. Mix sugar in the melted butter and place bowl in the fridge for a few minutes.
  2. In a medium bowl mix together the flour, baking powder, baking soda, cornstarch, and salt. Set aside.
  3. Take sugar and butter mixture out of the fridge. Transfer to a large bowl and add butter extract, egg, vanilla extract, milk and greek yogurt. Fold dry ingredients into the wet ingredients until no flour streaks remain. Fold in rainbow chips. And distribute into cupcake liners. Bake for 20 minutes, or until a toothpick inserted comes out clean.

Frosting

  1. Once cupcakes are completely cool start frosting. Beat butter for 3 minutes. Add vanilla extract, powdered sugar, and heavy cream. Beat on low until powdered sugar is combined then beat on high for 4minutes. Fold in rainbow chips and pipe or spread onto cupcakes

Equipment

Notes

*Total time includes cupcake cooling time

  • Author: Elizabeth Waterson
  • Prep Time: 15 minutes
  • Cook Time: 20 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
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Recipe adapted from Sally's Baking Addiction

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    If you love this recipe, please consider leaving a ⭐ star rating ⭐ when you post a comment. Star ratings help people discover my recipes online. I am incredibly grateful for your support! —xx Liz

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  1. Debra says

    For the life of me I can’t find rainbow chips….is it sprinkles or round sprinkles?

    Reply

  2. Debra says

    Oh wow you actually responded! Thank you! My friend made these in September for a baby shower and I can’t get them out of my mind! I can’t wait to make these for my 40th birthday this week 🙂 I even bought little rainbow and unicorn candles. Thanks again :))

    Reply

    • Elizabeth Waterson says

      Aww, that sounds perfect!!!! I hope you have a lovely Birthday Debra!! XX Liz

      Reply