Big slice o' cake
- The Rainbow Team
- Apr 29, 2015
- 2 min read

Equipment
You'll need a 30cm round cake board.
Ingredients
2 x 340g packets golden buttercake mix or 2 quantities Homemade buttercake
2 quantities Buttercream icing
Blue food colouring
1/4 cup cocoa powder, sifted
1/4 teaspoon silver cachous
3 blue icing flowers
Homemade buttercake
125g butter, softened
1 teaspoon vanilla extract
3/4 cup caster sugar
2 eggs, lightly beaten
1 1/2 cups self-raising flour, sifted
1/2 cup milk
Buttercream icing
125g butter, softened
1 1/2 cups icing sugar mixture
1 tablespoon milk
Method
Step 1
Preheat oven to 180°C/160°C fan-forced. Grease a 9.6cm-deep, 20cm (base) loose-based round cake pan. Line base and side with baking paper.
Step 2
Make packet cakes following packet directions, or homemade cakes.
Step 3
Make homemade buttercake: Using an electric mixer, beat butter, vanilla and sugar until light and fluffy. Add eggs, 1 at a time, beating after each addition. Add flour and milk. Stir to combine.
Step 4
Spread into prepared pan. Bake for 1 hour 10 minutes or until skewer inserted in centre comes out clean. Stand in pan for 5 minutes. Turn out onto a wire rack to cool completely.
Step 5
Make icing: 1 Using an electric mixer, beat butter in a bowl until light and fluffy. Gradually add icing sugar mixture and milk, beating constantly until combined. Place 1/4 cup icing in a piping bag fitted with a 1cm fluted nozzle. Transfer two-thirds remaining icing to a bowl. Tint blue. Stir cocoa through remaining icing.
Step 6
Using a serrated knife, level top of cake if necessary. Cut a large wedge from cake (see note). Discard trimmings. Cut wedge horizontally in half. Place cake base on board. Thinly spread top and sides with half the chocolate icing. Top with 1/2 cup blue icing, using a palette knife to create a rough texture around edge. Place remaining cake on a board. Spread top and sides with remaining chocolate icing. Place on top of blue filling. Spread remaining blue icing on cake top, using a palette knife to create a rough texture. Pipe rosettes on cake top. Decorate with cachous and flowers. Serve.
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