Mix the butter, sugar, and lemon zest until smooth.
1 ¾ cups soft butter, 1 ¾ cups sugar, 1 lemon for 2 teaspoons grated lemon zest
Add each egg and whisk until smooth.
5 eggs
Mix in the dry ingredients. Mix until smooth.
2 ¾ cups all-purpose flour, 1 cup cornstarch, 2 teaspoons baking powder
Pour/spread in a greased 9 x 13 baking dish.
Bake for 25 minutes. Check and bake longer until a toothpick comes out clean.
When done, take out of oven and poke with a toothpick all over the top.
Mix glaze ingredients
2 cups powdered sugar, 7 tablespoons of lemon juice
Pour on glaze while cake is still hot so it seeps into holes and covers the top.
Optional: festive sprinkles
Leave to cool. When cool, cut into slices and put in small decorative boxes or tins to share.