Fill each muffin liner one third full with batter.
Pipe or spoon a heaped teaspoon of cream cheese in the center.
Cover with more batter until cups reach about three quarters full.
Top with a layer of streusel. Press crumbs in with a light hand.
Bake 15 to 18 minutes until a toothpick at the edge comes out clean.
Cool in the pan 5 minutes. Move to a rack. Whisk milk and powdered sugar. Drizzle over warm muffins.