Sift in the flours and beat on a low speed until combined. You will have quite a thick batter.
Divide batter into baking cups and smooth the surface.
Bake for 25-30 minutes, or until a skewer comes out fairly clean. Allow to cool.
125g unsalted butter, room temperature
3 cups icing sugar, sifted
1-2 tsp lemon rind, finely grated
1-2 tbsp milk
Beat butter and icing sugar until light and fluffy. Grate in lemon rind and thin buttercream to the desired consistency with the milk. Pipe onto your lovecakes.