Rainbow drip cake tutorial

Dani Brazier from Blue Door Bakery shows you how to make a rainbow drip cake in this simple step-by-step tutorial...

We love a rainbow! Cover your ombre tier in a pretty pastel rainbow, skilfully dripping down the side - so beautiful! 

Tip! Make sure your cake is very set and cold. This helps set the drips and ensure they don't go all the way to the bottom. 

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You will need

Edibles

  • 6in round, 6in tall cake
  • Baby pink, peach, lemon, mint, sky blue and lavender gels (or your choice of colours)
  • 120g white chocolate
  • 90g double cream
  • White icing colour
  • Buttercream

Equipment

  • 8in white cake board
  • Side scraper
  • Palette knife
  • Teaspoons
  • Lots of bowls or a muffin tray
  • No. 18 piping nozzle
  • No. 172 piping nozzle
  • Cling film
  • Piping bag
  • Cake leveller

Instructions

Prepare your cake

1
Level your cakes using a cake leveller to ensure they are all even and straight. I split three cakes in half to have six yummy layers!
2
Stack the layers with buttercream. You can insert a cake dowel through the centre for more support if needed. Add some buttercream on the top.

Cover the cake

1
Cover the whole cake in buttercream. Take a scraper and gently smooth it all out and scrape off the excess buttercream. Once smooth pop in the fridge for half an hour to firm and set.
2
Mix up some 3-4 different shades of pink buttercream and add this on to the top of your cake and spread flat.
3
Add a strip of the lightest pink buttercream around the top then add rows of darker buttercream.
4
Continue adding darker buttercream in rows down the cake until it is all covered.
5
Scrape around the cake very gently to smooth out this buttercream. If there are any gaps, just fill out the gaps with more buttercream and smooth again.
6
With a palette knife, flatten the ridge of buttercream into the centre of the cake so you have a neat edge of buttercream. Place back in the fridge to set for 30 minutes.

Make the drip effect

1
Melt together in the microwave 120g white chocolate and 90g double cream for 30-40 seconds and stir until smooth. Add in 1tsp of white icing colour.
2
Use lots of bowls or make it super easy and use a muffin tray. Split the ganache evenly an add in your gel colours to create your rainbow colour scheme.
3
Take your cake out of the fridge and using a teaspoon, start to push a tiny amount of ganache over the edge of the cake. Push approximately a pea sized section over the edge to create your drip.
4
Create 2-3 drips in each colour continuing around the cake. Slowly spread the ganache back into the middle of the cake so all the colours meet in the middle.
5
Once the cake is covered in pretty drips, place the cake back in the fridge for 20 minutes to help the drip set.

Add piped decoration

1
Colour a few tablespoons of buttercream in rainbow colours and place rows of the coloured buttercream on some cling film.
2
Roll up the rows in the clingfilm to create a sausage. Snip off the end of the cling film to expose the buttercream.
3
Add this into a piping bag with a no. 172 nozzle. I also added some green and blue buttercream into a bag with a no. 18 nozzle.
4
Start piping out small shapes onto the cake. Just squeeze a little keeping your piping bag still. Then stop squeezing and slowly pull away to create the shape.
5
Once you've got some piping on the cake, finish by adding some pretty sprinkles.
Last updated one month ago

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