Blueberry Muffins

After making my fruit pizza I had some blueberries leftover. For weeks I have been wanting to make homemade blueberry muffins so I finally got the chance. I used a recipe I found on all recipes. They turned out pretty good and I really like the streusel on top.
* The original recipe made 12. I cut it in half and that is what I posted here. This made about 9 muffins for me.

INGREDIENTS
1/4 cup butter, softened
1/4 cup and 2 tablespoons white sugar
1 eggs
1/2 teaspoon vanilla extract
1 cup all-purpose flour
1 teaspoon baking powder
1/4 teaspoon salt
1/4 cup milk
3/4 cup blueberries

1 tablespoon all-purpose flour
1 tablespoon brown sugar
1/8 teaspoon ground cinnamon
1 tablespoon butter, chilled


DIRECTIONS
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.p