Sour Cream Coffee Cake Muffins (Print Version)

# Ingredients:

→ Streusel Topping

01 - 1/2 cup all-purpose flour
02 - 1/2 cup granulated sugar
03 - 1 teaspoon ground cinnamon
04 - 6 tablespoons unsalted butter, cut into 1/2-inch pieces

→ Batter

05 - 2 1/4 cups all-purpose flour
06 - 2 teaspoons baking powder
07 - 1/2 teaspoon baking soda
08 - 1/4 teaspoon salt
09 - 1/3 cup unsalted butter, softened to room temperature
10 - 1/3 cup vegetable oil or canola oil
11 - 1 cup granulated sugar
12 - 2 large eggs
13 - 1 cup sour cream
14 - 2 teaspoons vanilla extract

# Instructions:

01 - Preheat oven to 350°F (175°C). Line a standard muffin tin with paper liners and set aside.
02 - In a medium bowl, whisk together the flour, sugar, and cinnamon. Add the butter pieces and incorporate using a fork or pastry blender until the mixture forms coarse crumbs. Set aside.
03 - In a separate medium bowl, whisk the flour, baking powder, baking soda, and salt together. Set aside.
04 - In the bowl of a stand mixer fitted with the paddle attachment, beat the softened butter, oil, and granulated sugar together until smooth and creamy.
05 - Add the eggs one at a time, beating well after each addition to ensure thorough integration.
06 - Reduce mixer speed to low. Pour in sour cream and vanilla extract, mixing until just combined.
07 - Gradually add the dry flour mixture to the wet ingredients. Mix until just combined, being careful not to overwork the batter. Finish by stirring by hand with a spatula to ensure all ingredients are incorporated from the bottom.
08 - Spoon a generous tablespoon of batter into each muffin cup. Sprinkle a portion of the streusel over the batter. Divide remaining batter among the cups, then top each with the rest of the streusel, distributing evenly.
09 - Bake in the preheated oven for 15 to 20 minutes, or until a toothpick inserted into the center of a muffin emerges clean.
10 - Transfer the muffin tin from the oven and carefully remove each muffin onto a wire rack to cool completely before serving.

# Notes:

01 - Use a light hand when combining the batter to ensure moist, tender muffins.