Preheat oven to 400 degrees. Place muffin liners into 8 tins and set aside.
Blend together all the ingredients (except blueberriein a bowl of an eclectic mixer with the paddle attachment.
Fold in the blueberries.
Divide the batter amongst the cups, sprinkle a little sugar on top of each if desired.
Bake 15-20 minutes until the tops are no longer wet.