I found this recipe on the lovely blog ( from beyond my kitchen window ) I don't know how to do links from my I pad but you can find it in my blog list. I made this today it was very easy to make and is so moist and yummy.
11/2 cups sugar
11/2 cups P flour
Juice from one lemon
1 cup icing sugar
Juice from a lemon
Cream butter and sugar, add eggs one at a time. Add salt, flour,lemon juice stir through till combined.
Poor into a 9x13inch lined tin.
Cook at 180 c for 30 mins
Mix icing sugar with lemon juice poor over cooled slice