Berry Cheesecake Muffins

1/3 c butter, softened
3/4 c sugar
2 eggs
1-1/2 c flour
1-1/2 t baking powder
1 t cinnamon
1/3 c milk

Cream Cheese Filling:
6 oz softened cream cheese
1/3 c sugar
1 egg
1-1/2 c fresh or frozen berries (blackberries, raspberries, blueberries...whatever)

Streusel Topping:
1/4 c flour
2 T brown sugar
1/2 t cinnamon
1 T cold butter

In a large mixing bowl, cream butter and sugar. Add eggs; beat well. Combine the flour, baking powder, and cinnamon; add to creamed mixture alternately with milk. Fill greased or paper-lined muffin cups half full.
For filling, in a small mixing bowl, beat cream cheese, sugar and eggs until smooth. Fold in the berries. Drop a rounded tablespoonful into the center of each muffin. For topping, combine the flour, brown sugar, and cinnamon in a small bowl; cut in butter until crumbly. Sprinkle over batter.
Bake at 375 for 25-30 minutes or until a toothpick comes out clean. Cool for 5 minutes before removing from pans to wire racks. Serve warm. Refrigerate leftovers.