Ingredients

250 g butter
250 g sugar
4 eggs
200 g buttermilk or 200 g milk with 1 tablespoon of lemon/ vinegar η ξινόγαλα
1 tablespoon baking powder
370 g flour
Lemon zest and juice of three lemons

For the glaze

1 cup icing sugar
Lemon juice of one or two lemons