Blueberry Streusel Muffins

Preheat oven to 375 degrees F (190 degrees C). Grease muffin cups or line with paper muffin liners.

In a large bowl cream together the butter and sugar until light and fluffy. Stir in the eggs one at a time beating well with each addition then stir in the vanilla. In a separate bowl stir together 2 cups flour baking powder and salt.

Stir the flour mixture into egg mixture alternately with milk. Fold in blueberries. Spoon batter into prepared muffin cups. In a small bowl mix together 2 tablespoons flour brown sugar and cinnamon. Cut in butter until mixture resembles coarse crumbs. Sprinkle topping over unbaked muffins.

Bake in preheated oven for 25 to 30 minutes until a toothpick inserted into the center of a muffin comes out clean.