Sour Cream Coffee Cake Muffins

Name: Sour Cream Coffee Cake Muffins
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: ½ cup all-purpose flour; ½ cup granulated sugar; 1 teaspoon ground cinnamon; 6 tablespoons unsalted butter, cut into ½ inch pieces; 2 ¼ cups all-purpose flour; 2 teaspoons baking powder; ½ teaspoon baking soda; ¼ teaspoon salt; 1/3 cup unsalted butter, softened to room temperature; 1/3 cup vegetable or canola oil; 1 cup granulated sugar; 2 large eggs; 1 cup sour cream; 2 teaspoons vanilla extract