Cream your sugar and butter till it turns pale.Add ur Eggs and mix.Add in ur lemon zest and vanilla flavour

Sieve ur flour and baking powder. Add ur dry ingredients to ur wet ingredients mix well. Divide the batter into two add ur Brown food colour to one part of the batter and mix

In a baking pan add one tablespoon of the plain batter then one tablespoon of the brown batter.. continue this process till you exhaust the batter. Bake in an oven.As for me I used a local oven.