Rainbow Smarty Cake Recipe

Perfect for any celebration but ideal for your child’s next party, the rainbow smarty cake recipe is a cinch to get right with the hardest thing being not to eat the Smarties!


Rainbow Smarty CakeWhat you need for the cake:

  • 80g unsalted butter – softened
  • 280g caster sugar
  • 200g plain flour
  • 1 tbsp baking powder
  • 1/4 tsp salt
  • 240ml whole milk
  • 2 large eggs
  • food colouring in all primary colours (red, blue and yellow)


  1. Preheat the oven to 190°C and spray 2 8″ round cake tins with oil spray and line base with baking paper
  2. Using a hand held electric whisk, beat together the butter, sugar, flour, baking powder and salt on a low speed until the ingredients resemble fine breadcrumbs
  3. Pour the milk into a jug, add the eggs and whisk together
  4. Pour three quarters of this mixture into the dry ingredients and beat on a low speed to combine
  5. Raise the speed to medium and continue to mix until smooth and thick
  6. Pour in the remaining milk mixture and keep mixing on a medium speed until all the ingredients have come together and the batter is smooth
  7. Separate the batter into 4 bowls
  8. Colour using the food colouring: x1 blue x1 red x1 orange x1 yellow TIP: Make the colours very strong
  9. Pour the batter into the cake tins a spoonful at the time TIP: DO NOT MARBLE as this may make your colours turn muddy
  10. Bake for 20 minutes or until skewer comes out clean.

While the cake is cooling make the frosting.

What you need for the frosting and decoration:
  • 400g icing sugar
  • 1 tbs vanilla extract
  • 160g unsalted butter – softened
  • 50ml whole milk
  • 12 tubes of smarties (or 450g) perhaps get more for eating incidentals.


TIP: Sort your Smarties into coloured piles first

  1. Whisk the icing sugar with butter on a low speed until the mixture is sandy in consistency
  2. Pour in the milk, still mixing on a low speed, then increase the speed to high and whisk the frosting until soft and fluffy
  3. When the cakes are cool, spread a layer of frosting between the 2 cakes. Then spread frosting all over the top and sides of the cake
  4. Starting on top in the centre start placing your Smarties. Work your way round in colour batches

This cake got a lot of attention at the party and it tasted delicious and moist. So if you want a high impact cake with little effort and skill required you should definitely give this one a go!Jade from Havven Sign OffLeave comments or tag us in your own creations on social media!



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