Rainbow Bundt Cake

I’ve wanted to make a rainbow bundt cake for a while but just never got round to it.  I had no idea how the inside of the cake would come out so it was very exciting cutting into it… would the coloured layers just become a shade of muddy green or would there be an array of rainbow shades? That’s part of the wonder of a cake… cutting into it to see what secret it holds and then sharing it with friends and family!


337 g softened butter

450g caster sugar

6 eggs (I usually use large)

525g plain flour

1/2 tsp bicarbonate of soda

1/2 tsp salt (I use lo-salt)

375ml vanilla yogurt

2 tsp vanilla essence

Gel food colouring in rainbow shades – red orange yellow green blue purple


Pre heat oven to 170 degrees.

Grease and flour your bundt tin.  (Could be made in a square or round cake tin. Quantities could be reduced for a smaller tin, if you’re unsure half the ingredients as this was a 12 cup bundt tin.)

Weigh the bowl you’re mixing your cake batter in… this will make sense later.

Cream the sugar and butter together.

Add the eggs one at a time beating gently.

Add the vanilla essence to the yogurt.  Add the salt and bicarb to the flour.

Add one third of the flour and mix in, then half of the yogurt and mix in… complete this sequence with the last addition being flour.

Separate the mix into six different bowls… take the overall weight of the batter and divide by 6.

Add a different gel colour to each bowl, you need to be generous with the colour so that it colours the cake but don’t go overboard!  I use a cocktail stick and try not to get it everywhere.

Mix the colour into the batter until a pure colour is achieved.

I then layered the colours into my bundt tin in the order of the rainbow – red orange yellow green blue purple, put my cake in the oven and waited to see what would happen.

I have a fan oven but always need to turn my cake round after half an hour.  This cake still looked a little bit underdone after one  hour so I took it out of the oven after 1 hour and 1o minutes.

I turned this out of the bundt tin straight away thought it could be left to cool in the tin.

Waiting for the cake to cool was the hardest part… waiting to see what secret was held inside.  Mr C wouldn’t go to bed until it was cool enough to try!

20140115_212740Before being turned out of the bundt tin.




Cooling on a wire rack.

20140115_222211The secret is revealed.

20140115_222439This cake was tested on my guinea pigs at work and I can’t believe all the amazing comments I received.  The colour amazed them and they couldn’t believe that the cake was so bright and colourful as well as moist!

A successful rainbow bundt!


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