Disposable muffin tins Cupcake liners 1/2 cup butter or one stick 1 cup granulated sugar 3 large eggs added one at a time 2 cups all purpose flour Mixing bowls Mixer with paddle attachments 1 tsp baking powder 1 tsp baking soda 1/2 tsp salt 1 cup sour cream 1 tsp vanilla 2 cups blueberries tossed in 1 tbsp flour and sugar

Heat oven to 350 f or 180 c Cream together butter and sugar Add eggs one at a time Mix dry ingredients with egg mixture Add sour cream, blueberries and vanilla to mix mix well Fill muffin tins 2/3 full Top with 1/2 cup sugar 1/2 cup flour 4 tbsp butter 1/2 tsp cinnamon Bake 350 30 minutes