Apple Nut Muffins

INGREDIENTS

• 3/4 cup butter
• 1 1/2 cups white sugar
• 3 eggs
• 1 1/2 teaspoons vanilla extract
• 3 1/2 cups all-purpose flour
• 1 1/2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 3/4 teaspoon salt
• 1 1/2 cups sour cream
• 1 (21 ounce) can apple pie filling
• 1 cup chopped walnuts
• 1/4 cup white sugar
• 1/2 teaspoon ground cinnamon