Sour Cream Coffee Cake

Name: Sour Cream Coffee Cake
Prep time: 20 min
Cook time: 60 min
Total time: 1 h 20 min
Yield: 12
Ingredients: Ingredients; 1 cup (2 sticks) unsalted butter, softened; 1 1/2 cups granulated sugar; 3 large eggs, room temperature; 2 teaspoons vanilla extract; 3 cups all-purpose flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon salt; 1 cup sour cream, room temperature; 1/2 cup whole milk; Streusel Topping; 1/2 cup all-purpose flour; 1/2 cup brown sugar, packed; 1/3 cup cold butter, cubed; 1 1/2 teaspoons ground cinnamon; 1/4 teaspoon salt; 1/2 cup chopped walnuts or pecans (optional)