So I looked up some lemon balm recipes and found one for bread. I believe I have tried this recipe before as I remember that it involves a glaze on it, which immediately makes me not want to try it again since I know it will be sticky (and I don't do sticky well). So I made some adjustments.
1/2 cup butter or margarine, softened (ours is already soft)
1 cup sugar
1/2 cup chopped lemon balm leaves
1 1/2 cup flour
1 1/2 tsp. baking powder
1/4 tsp. salt
1/2 cup milk
3 tsp. lemon juice
Cream together the butter, sugar and lemon balm. Add eggs and mix well. Add dry ingredients, milk and lemon juice. Mix well. Bake in a greased loaf pan at 350 degrees for 50 minutes.