Rainbow cake with vanilla buttercream icing. Rainbow cake with vanilla buttercream icing. the best icing & soft spongy cake ever! The first step to making your rainbow frosting swirls is to prepare your buttercream. For this technique, you can use any white frosting with a pipeable consistency.

Ingredients of Rainbow cake with vanilla buttercream icing.

  1. You need 3 cup of self-raising flour.
  2. You need 1 1/2 cup of white sugar.
  3. Prepare 6 medium of eggs.
  4. You need 2 tbsp of of water.
  5. You need 1 1/2 tsp of vanilla essence.
  6. Prepare 1 cup of margarine.
  7. You need 1/2 tsp of salt.
  8. You need 1/2 tsp of each of different colours (i use powdered colours).
  9. It's of Icing.
  10. It's 1/4 cup of margarine.
  11. You need 1/4 cup of shortening.
  12. It's 3/4 tsp of vanilla.
  13. Prepare 2 cup of icing sugar.
  14. You need 1 tbsp of milk.

Rainbow cake with vanilla buttercream icing. instructions

  1. Pre-heat oven at 160°C. It's a slow-bake cake..
  2. Grease & flour a 7 inch diameter round baking dish..
  3. Sieve flour & salt. Keep aside..
  4. In a bowl, add margarine + sugar & mix well with a mixer at high speed till fluffy and creamy..
  5. Add the eggs + vanilla & mix well till well combined & mixture looks curdy..
  6. Add the flour mixture & mix well till all combined..
  7. If mixture is too heavy, add the water & mix well on high speed..
  8. Take 7 bowls. Scoop using a serving spoon, the cake mixture & distribute evenly in the bowls. Repeat till all the mixture is used up..
  9. Now add the food colouring. Red, orange, yellow, green, blue, pink, purple. Different colour for each bowl. ( unfortunately, i ran out of blue colour, so i used 6).
  10. Mix well. DONT use the same spoon for all the bowls....
  11. Pour 1 bowl at a time, into the baking dish, spreading CAREFULLY to the edge of the dish. Make sure not to mix-up the colours..
  12. Place in the oven. Bake for about 1& a half hours or until a wooden pick inserted in the middle, comes out clean..
  13. Cool completely on wire rack. Make sure the cake is COMPLETELY COOL before spreading the icing..
  14. For the Icing:.
  15. In a large bowl, cream margarine & shortening till light & fluffy. Add vanilla, icing sugar & milk. Mix well. (U can add a tablespoon more of milk to make it the consistency u require.).

To make the frosting, beat the butter in a large bowl or the bowl of a stand mixer until light and fluffy. Add the powdered sugar, milk, vanilla, and salt, and mix to combine. Vanilla Buttercream Frosting: While the cake layers bake and cool, make the vanilla buttercream frosting. Alternate with small splashes of cream. The rainbow swirl buttercream frosting is really easy to achieve.

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