Spiral cake with marbled sponge – or cake and maths

Geometric spiral cake with marbled sponge, including full recipe, instructions and pdf template

Rhubarb and raspberry friands with lime buttercream

Rhubarb and raspberry friands with lime buttercream

Walnut cake with lemon buttercream

This is an amazingly bouncy walnut sponge topped with a lemon buttercream – this is a change to the traditional coffee and walnut combination but goes beautifully together.   Notes For this recipe I’ve used a mix of unsalted butter and baking margarine. I did some experimenting comparing all butter, all margarine and a mix