Vanilla and Cinnamon Crumb Cake Recipe - Food.com

Ingredients

• 1 1/2 cups cake flour
• 2/3 cup sugar
• 1 1/2 teaspoons ground cinnamon
• 1 teaspoon pure vanilla extract
• 10 tablespoons cold unsalted butter, cut into small pieces
• 6 tablespoons unsalted butter, at room temperature
• 3/4 cup sugar
• 3 large eggs
• 2 teaspoons pure vanilla extract
• 2 1/4 cups cake flour, unsifted
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup sour cream (not fat-reduced)