sour cream bran muffins

INGREDIENTS

• 1 stick (1/2 cup) unsalted butter, softened or 1/2 cup vegetable oil
• 1/4 cup firmly packed light brown sugar
• 1 large egg, beaten lightly
• 1 cup sour cream or yogurt
• 1/4 cup dark molasses
• 1/2 cup raisins, cranberries, or other diced dried fruit
• 1 cup all-purpose flour
• 1 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup miller’s bran (available at natural foods stores, specialty foods shops, and some supermarkets)
• 1/4 teaspoon cinnamon (optional)