Joanna Hacker's
Rainbow cake
![](https://thegreatbritishbakeoff.co.uk/wp-content/uploads/formidable/6/Collage_2022-09-08_12_22_57-1-e1662678456258-450x450.jpg)
- Bake type: Cakes
- Made in: Bristol
- Skill level: Medium
- Time taken: 4 hours
About this Bake
This cake was made for my nephew's 12th birthday.
Top tip
Used black cocoa to achieve a black buttercream.
This cake was made for my nephew's 12th birthday.
Used black cocoa to achieve a black buttercream.