Preheat your oven to 160 degrees C (gas mark 3)
Cream the butter and eggs (we use our Kmix for this). I have shown the boys before that when creaming butter and eggs the mixture changes colour.
Crack your eggs in to a jug and whisk.
Measure your flour, baking powder and grate your lemon zest.
Add some of the beaten egg to the creamed butter and flour with a small amount of the flour mixture and continue to wix until all combined.
Spoon into a pre greased and lined loaf tin (we use a silicon one which means that we do not need to line it).
Cook for 55 - 60 minutes.
Remove from oven and leave to cool in tin for around 5 minutes before turning out.