Step 1

1 Preheat oven to 180ºC and line five 20cm-cake tins with baking paper. If you don’t have more than one cake tin, you will have to do this in batches.

Step 2

2 In the bowl, place all wet ingredients and beat with an electric beater until smooth. Sift dry ingredients into wet mix and stir. Divide batter evenly into five bowls.

Step 3

3 Into each bowl, place individual colouring ingredients and mix well. Pour each coloured mixture into prepared cake tins (or start with the blue batter) and cook for 12-15 minutes. Allow cakes to cool before assembling and icing.

Step 4

4 To make icing, in a blender, place cream cheese, icing sugar and lemon juice and blitz until smooth.

Step 5

5 To assemble cake, place blue cake on serving plate, spread over some icing, repeat with green, yellow, orange and red cake layers. Spread remainder of icing around the outside.

Step 6

6 Arrange edible flowers, if using, and raspberries over cake with candles and serve.