Preheat oven to 160°C fan / 180°C conventional. Lightly grease a 12-hole mini loaf tin with butter.
In a large mixing bowl, cream the butter and caster sugar until light and fluffy.
200 grams Unsalted butter or margarine (I use Stork), 200 grams Caster sugar
Beat in the eggs, one at a time, until well combined. You can add 1 tbsp of the 200g flour with each egg to stop the mixture from curdling.
2 large Eggs
Add the flour, milk and lemon zest. Gently fold the mixture together until smooth and just combined.
200 grams Self-raising flour, 2 tbsp Milk, 1 Lemon
Divide the mixture evenly between the tin, filling each hole ¾ full. The easiest way to do this is to spoon the cake mixture into a large piping bag and pipe the mixture into each hole. Less messy and much quicker!
Bake for 20 minutes until risen and lightly golden.