Blueberry Streusel Muffins

This morning I was in a mood to make some muffins, so I raided my cabinet and freezer. I went to one of my favorite sites; Taste of Home and found this recipe. They are very good and not overly sweet (that's what chocolate chip muffins are for) ;o)

1/4 cup butter, softened
1/3 cup sugar
1 egg, beaten
1 teaspoon vanilla extract
2-1/3 cups all-purpose flour
4 teaspoons baking powder
1/2 teaspoon salt
1 cup milk
1-1/2 cups fresh or frozen blueberries

STREUSEL:
1/2 cup sugar
1/3 cup all-purpose flour
1/2 teaspoon ground cinnamon
1/4 cup cold butter
In a large bowl, cream butter and sugar. Beat in egg and vanilla; mix well. Combine the flour, baking powder and salt; add to creamed mixture alternately with milk. Fold in blueberries.
Fill 12 greased or paper-lined muffin cups two-thirds full. In a small bowl, combine the sugar, flour and cinnamon; cut in butter until crumbly. Sprinkle over muffins.

Bake at 375° for 25-30 minutes or until browned. Cool for 5 minutes before removing to a wire rack. Serve warm.

Yield: 1 dozen.