First in a mixing bowl add lemon zest, lemon juice, vanilla extract mix everything then add sugar, baking powder mix everything together

Now pour this mixture into a greased cake tin then baked it at 150 degree celcius for 35 to 45 minutes or check by pushing a stick.. in the meanwhile make a icing for the cake for this

In a bowl mix lemon juice and icing sugar whisk it till it becomes fluffy.. once the cake is done rest it for few minutes then spread the lemon icing on it then cut and serve....