Smarties Surprise Cupcakes With Rainbow Frosting

I am in love with these chocolate cupcakes! The first installment of my Candy Chocolate bakes, these are perfect as a show of what is to come in this category 🙂

I have an obsession with incorporating all types of candies and chocolate bars into my cakes, cookies and desserts and these cupcakes are just right for using Smarties.

It was a while since the last time I ate Smarties and I had actually forgotten about them 🙂 I recently got a few packs and immediately started brain storming ideas for a cupcake.

I am so happy with how they turned out, an insanely delicious and fudgy chocolate cupcake stuffed with Smarties topped with a fluffy and creamy frosting. That frosting! Isn’t it too cute! I actually wanted to make a swirl frosting but went for a colourful rainbow frosting instead 🙂 perfect for matching the colours of the Smarties!

These cupcakes were the most fun to make! especially if you have kids. Let them be creative and help with the decorating.

Let me start with the chocolate cupcake, Oh my gosh! One of the best cupcakes I’ve ever had! They’re just so moist and fudgy and the flavour is spot on. What’s more is that they are ridiculously easy to make! The recipe doesn’t even require a mixer, just a good old hand whisk is good.

Once the cupcakes are baked and cooled, carve out a little hole in the middle and fill with Smarties. A little bit of frosting can be added too if you like.

Fill in with some Smarties and then cover as best as you can with the carved out piece of cake.

The rainbow frosting is quite simple to make. Using my ultimate buttercream recipe, all you have to do is make some streaks of colour using food colouring by taking small amounts of frosting and tinting them with just a hint of colour.

Dollop the frosting on top of the remaining frosting and using a knife make some streaks, just once vertically and once horizontally. Make sure you don’t mix in the colours too much or else you won’t have streaks.

Scoop into a piping bag and frost your cupcakes in any way you like. Top with extra Smarties and devour!


Smarties Surprise Cupcakes With Rainbow Frosting

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Recipe by Linda @thedutchbaker


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  • 1/2 cup (100gms) softened butter*

  • 1/4 cup (24gms) + 2 tablespoons cocoa powder

  • 3/4 cup (185mls) hot coffee or boiling water

  • 1 teaspoon vanilla extract

  • 1/3 cup (80gms) sour cream

  • 1 large egg

  • 3/4 cups (150gms) sugar

  • 1 cup (125gms) all purpose flour

  • 3/4 teaspoon baking soda

  • 1/2 teaspoon salt

  • 2 – 3 packets Smarties (M&Ms or Reese’s Pieces can be substituted)

  • For the frosting
  • 1 recipe Vanilla Buttercream

  • Food colouring


  • Preheat oven 180C/350F. Line a muffin tray with cupcake cups.
    In a small bowl, measure the cocoa powder and pour the hot coffee or water on top. Stir to mix well. Add in the butter and vanilla extract and whisk until the butter has melted and mixture is combined.
  • Measure the flour, baking soda and salt. Add in the sugar and whisk well. Set aside. In a separate bowl, whisk egg and sour cream until well combined. Slowly pour in the cocoa/butter mixture and whisk well.
  • Scoop batter into cupcake cups and bake for 15 – 18 minutes until cooked through, toothpick or knife comes out with a few moist crumbs but no batter. Cool on wire rack and frost.
  • For the frosting
  • Make frosting according to instructions in the recipe post.
  • Take about 1/3 of the frosting and divide into smaller amounts depending on how many colours you are using. Tint each dollop of frosting with a drop of colour then spoon back on top of the remaining frosting.
    Score the frosting with a knife once vertically then once horizontally. Scoop frosting into a piping back and frost cupcakes. Top with extra Smarties.


  • *I have used 1/4 cup butter and 1/4 cup oil in these cupcakes and the outcome was delicious.
  • Cupcake recipe adapted from City Cupcakes.

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  1. GorgeousPrincess♡ says:

    Yummy.. yummy… yummy…
    SuperDuperLicious… ♡♡♡
    PERFECT 😍😍😍

    1. Ok Princess you know you ate 4 yourself right 😛 they really were delicious! Xx

  2. Oh, gosh, I don’t NEED this site but it sure does look delicious.

    1. Hehe well there’s a fine line between want and need right 😉 😉 thanks Carol for stopping by and leaving your sweet comment! God bless xx

  3. I am in cupcake heaven right now !!! Love cupcakes 🙂

    1. Me too! Cupcakes are the best! 🙂 this is one of my favourite chocolate cupcakes 🙂

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