1/3 cup plus 2 tablespoons packed brown sugar, divided 
2 teaspoons ground cinnamon, divided 
1 1/2 cups all-purpose flour 
2 teaspoons baking powder 
1/2 teaspoon salt 
1/2 teaspoon baking soda 
1/2 teaspoon ground allspice 
1 cup mashed cooked or canned sweet potatoes 
3/4 cup low-fat buttermilk 
1/4 cup vegetable oil 
1 egg
Preheat oven to 425°F. Spray 12 standard (2 1/2-inch) muffin cups with nonstick cooking spray. Combine 2 tablespoons brown sugar and 1 teaspoon cinnamon in small bowl; mix well. Set aside. 
Combine flour, baking powder, remaining 1 teaspoon cinnamon, salt, baking soda and allspice in large bowl. Stir in remaining 1/3 cup brown sugar. Combine sweet potatoes, buttermilk, oil and egg in medium bowl; mix well. Stir into flour mixture just until moistened. Spoon evenly into prepared muffin cups. Sprinkle with brown-sugar cinnamon mixture. 
Bake 14 to 16 minutes or until toothpick inserted into centers comes out clean. Remove to wire rack; cool completely. 
Yield: 12 muffins.
Serving size: 1 muffin. 
Nutrition Facts Per Serving:
 Calories:  166
Carbohydrates:  26 g
Protein:  3 g
Fat:  6 g
Saturated Fat:  1 g
Cholesterol:  19 mg
Sodium:  256 mg
Fiber:  1 g
 
Exchanges per serving:
 1 1/2 Bread/Starch, 1 Fat.