Blueberry Muffins

Difficulty: easy Prep Time: Five Minutes Total Time: 30 Minutes or Less
1/2 cup butter
1 cup sugar
2 eggs
3/4 cup milk
2 cups flour
1 cup blueberries
1/4 tsp vanilla
2 tsp baking powder

Mix all ingredients together and bake in muffin pan at 350°F until done.