1 stick butter
1 c. sugar
2 eggs
2 c. flour
1 tbsp. powdered sugar
1 tsp. baking soda
1 c. sour cream

STREUSEL:

1 c. flour
1/2 c. sugar
3/4 stick butter

Mix coffee cake ingredients together. Mix streusel ingredients and sprinkle on top of cake. Bake at 350 degrees. Use cookie sheet or 3 individual pans. Drizzle with powdered sugar frosting.