Preheat oven to 375°F; line muffin tin with cupcake liners.
Mix flour, sugar, baking powder, salt and cinnamon.
Mix together melted butter, milk, eggs and vanilla; add to dry ingredients.
In a separate bowl, beat the cream cheese with the powdered sugar.
Fill muffin liners halfway, top with cream cheese, more batter.
Sprinkle with cinnamon sugar & bake 18-20 mins.
