Joanna Homewood's
Vanilla sponge rainbow cake
![](https://thegreatbritishbakeoff.co.uk/wp-content/uploads/formidable/image673-450x450.jpg)
- Bake type: Cakes
- Made in: Henley-on-thames
- Skill level: Medium
- Time taken: Over 4 hours
Top tip
Always use your ingredients at room temperature when baking a sponge cake.