Name: Coffee Cake Muffins
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: 6
Ingredients: scant 1 cup flour; 1 teaspoons baking powder; 1/2 teaspoon baking soda; 1/2 stick butter, room temperature; 1/2 cup sour cream or plain yogurt; 1/2 cup granulated sugar; 1/2 teaspoon pure vanilla extract; 1 egg; 1/2 cup packed brown sugar; 1/2 cup flour; 1/2 teaspoon salt; 1/2 teaspoon ground cinnamon (more to taste); 1/2 stick cold butter, cut into small pieces