Snickerdoodle Muffins

Ingredients for 12 muffins

1/2 cup unsalted butter, softened
2/3 cup granulated sugar
1 eggs
1 1/2 tsp vanilla
1/2 cup milk
1/4 cup plain Greek yogurt or sour cream
1 2/3 cup all-purpose flour
1 1/2 tsp baking powder
1/4 tsp baking soda
1/2 tsp ground cinnamon
1/2 tsp salt

For topping:
3 Tablespoons butter, melted
1/3 cup granulated sugar
2 tsp ground cinnamon

Read the Instructions here