Spiced Sweet Potato and Walnut Cake

Don’t let the name of this cake put you off. Sweet potato in a cake does definitely work. All the flavours of this cake work really well together. The sponge is made with oil instead of butter so it’s very soft and bouncy but the walnuts give it a nice crunch and texture. The cream cheese frosting also really works, with the zest of a lime giving it a slight twist against the spice in the cake sponge.