Blueberry Muffins

Cream together 1/3 c. sugar, 1 1/2 c. butter. Add slightly beaten egg to above. Now add the ingredients below in order: 1 c. milk, 2 1/3 c. flour, 4 tsp. baking powder, 1/3 tsp. salt. Mix and add 1 tsp. vanilla. Carefully stir blueberries into batter. Put in cupcake liners in pan. Topping: Mix dry ingredients and add butter (use hands to mix well). Place mixture on top (1/2 c. sugar, 1/2 c. butter, 1/2 tsp. cinnamon, 1/2 c. flour).