Ingredients:
For the Cake:
- 1/2 cup (1 stick) unsalted butter, softened
- 1 cup granulated sugar
- 2 large eggs
- 1 cup sour cream
- 1 teaspoon pure vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1 teaspoon baking soda
- 1/4 teaspoon salt
For the Cinnamon-Sugar Filling:
- 1/2 cup brown sugar, packed
- 1 1/2 teaspoons ground cinnamon
- 1/2 cup chopped nuts (e.g., walnuts or pecans), optional