Apple Cinnamon Muffins: A healthy, delicious start to your day!

Ingredients

• 1/2 cup unsalted butter
• 1 cup all purpose flour
• 1 cup whole wheat flour
• 1/2 teaspoon salt
• 1 1/2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon cinnamon
• 1 1/2 cups apples peeled and diced (two apples)
• 2 large eggs
• 1 teaspoon vanilla extract
• 1/2 cup sour cream (reduced fat works great or substitute plain yogurt)
• 1/2 cup sugar