Food & Cooking Recipes Breakfast & Brunch Recipes Mini Coffee Cake Muffins 3.2 (113) 1 Review By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on September 7, 2017 Print Rate It Share Share Tweet Pin Email Yield: 2 dozen Ingredients For the Topping ¼ cup light-brown sugar ¼ cup all-purpose flour Pinch of salt Pinch of ground cinnamon 2 tablespoons unsalted butter, softened For the Batter 1 cup all-purpose flour ½ teaspoon baking powder ½ teaspoon baking soda ½ teaspoon salt 2 tablespoons unsalted butter, softened ½ cup sugar 1 large egg 1 teaspoon pure vanilla extract ¼ cup sour cream 2 tablespoons buttermilk Nonstick cooking spray, for pans Directions Preheat the oven to 375 degrees. To make the topping, in a medium bowl, combine brown sugar, flour, salt, and cinnamon. Add butter, and work in, using your fingers or a pastry cutter, until well combined; set aside To make the batter, in a medium bowl, whisk together flour, baking powder, baking soda, and salt; set aside. In the bowl of an electric mixer fitted with the paddle attachment, beat the butter and sugar until light and fluffy. Add the egg and vanilla, and beat to combine. Add the dry ingredients, alternating with the sour cream and buttermilk, and beginning and ending with the dry ingredients; scrape down the bowl as necessary. Spray eighteen cups of a mini-muffin tin with nonstick cooking spray. Divide batter evenly between cups. Sprinkle topping over batter. Bake until a cake tester inserted in the center comes out clean, about 15 minutes. Let stand in pans for 5 minutes. Remove to wire racks to cool. Use immediately. Rate it Print