Spiced Apple Cider Muffins

Ingredients

• 2 tablespoon(s) packed light brown sugar
• 4 teaspoon(s) whole-wheat flour
• 1/2 teaspoon(s) ground cinnamon
• 1 tablespoon(s) butter , cut into small pieces
• 2 tablespoon(s) finely chopped walnuts
• 1 cup(s) whole-wheat flour
• 1 cup(s) all-purpose flour
• 1 1/2 teaspoon(s) baking powder
• 1/2 teaspoon(s) baking soda
• 1/4 teaspoon(s) salt
• 1 tablespoon(s) ground cinnamon
• 1/2 teaspoon(s) ground nutmeg
• 1 large egg
• 1/3 cup(s) packed light brown sugar
• 1/2 cup(s) apple butter , such as Smucker's
• 1/3 cup(s) maple syrup
• 1/3 cup(s) low-fat plain yogurt
• 1/4 cup(s) canola oil