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This no-bake rainbow cake is almost too cute to eat! Give this cheat’s recipe a go next time you’re in need of a cake, it’s easier to create than you’d think.

  • Serves16
  • Prep time30 minutes
No-Bake Rainbow Cake recipe | Coles


  • 1 Coles White Mud Cake
  • 400g tub Betty Crocker Cream Cheese Frosting
  • 2 x 340g pkts Nestlé Smarties
  • 2 x 180g pkts Mars M&M’s
  • 16 white marshmallows, halved crossways

Check ingredient labels to make sure they meet your specific dietary requirements and always consult a health professional before changing your diet. View dietary information here.

Percentage Daily Intake information on our recipes is calculated using the nutrition reference values for an average Australian adult.


  1. Step 1

    Use a large serrated knife to trim the top of the cake and remove the icing. Cut the cake in half to make 2 semicircles. Spread 1 side of each semicircle with a little frosting and sandwich together. Place the cake on a serving platter.
  2. Step 2

    Spread cake with the remaining frosting. Arrange Smarties and M&M’s over the cake in a rainbow pattern. Arrange marshmallows at the base of the cake to make clouds.