Preheat the oven to 180C and line your cupcake tins with liners
In a bowl sift together the dry ingredients- flour, baking soda, and baking powder and keep it aside
In a separate bowl, beat together the butter, sugar and lemon zest until light and fluffy.
Add in the egg and egg yolks and beat mix well.
Blend in the oil and lemon juice and mix well.
Alternatively, add in the milk and the dry ingredients and combine well.
Fill in your cupcake tins 3/4 of the way through, and bake until a toothpick inserted comes out clean, about 15 minutes.
Cool completely before assembling