Blueberry Streusel Bread

4 Tbls butter (at room temperature)
3/4 cup sugar
1 egg
1/2 cup milk
2 cups flour
2 tsp. baking powder
1/2 tsp. salt
2 cups fresh blueberries

for the topping
1/2 cup sugar
1/3 cup flour
1/2 tsp. ground cinnamon
4 Tbs. butter, cut into pieces

1. Preheat the oven to 375. Grease a 9 inch square baking dish.
2. With an electric mixer, cream the butter or margarine with the sugar until light and fluffy. Add the egg beat to combine, then mix in the milk until blended.
3. Stir together the flour, baking powder, and salt, then stir into the above mixture.
4. Add the blueberries and stir.
5. Transfer mixture to a well greased 9 inch square pan.
6. For the topping, place the sugar, flour, cinnamon and butter in a mixing bowl, cut in with a pastry blender until the mixture resembles coarse crumbs.
7. Sprinkle this mixture over the batter in the pan.
8. Bake until a cake tester inserted in the center comes out clean, about 45 min. Serve warm...or cold.