2 c. Bisquick
1 c. sugar
1 c. sour cream
1 egg
1 1/2 c. frozen blueberries, thawed

TOPPING:

1/2 c. flour
1/2 c. sugar
1 stick butter

Preheat oven to 425 degrees. Mix all ingredients and fill muffin tin to half full. Blend all topping ingredients. Place a tablespoonful over each muffin. Bake at 425 degrees for 20-25 minutes.