INGREDIENTS
1/2 cup
butter, at room temp
1 cup
sugar
grated zest of half a lemon (optional)
2
large eggs
1 tsp
vanilla
2 cups
all-purpose flour
2 tsp
baking powder
1/4 tsp
salt
1/2 cup
milk or (3/4 cup thin yogurt)
1 cup
fresh or frozen blueberries (or dump in as many as you like)
sugar, for sprinkling (optional)