Cream the butter powdered sugar till light and pale in color.
Add eggs, vanilla extract, lemon zest, and yellow food color. Beat for 1 min.
Now add dry ingredients and mix nicely.
Lastly add milk and mix.
Pour into prepared pan and bake at 180℃ for 30 mins.
In another bowl beat butter till soft. Add icing sugar and beat for 3mins.
Now add all the other ingredients and beat for 2mins.
Put the icing into cooled cake.
Decorate as u want and enjoy yummyy cake...!!