Nutty Chocolate Muffins

Directions

• In a large bowl, combine the first six ingredients. In another bowl, whisk the eggs, buttermilk, butter and vanilla. Stir into dry ingredients just until moistened. Fold in peanuts and chocolate chips. Fill paper-lined muffin cups two-thirds full.
• Bake at 350° for 22-25 minutes or until a toothpick inserted in the center comes out clean. Cool for 10 minutes before removing from pans to wire racks to cool completely.
• In a small bowl, beat the peanut butter, butter, confectioners' sugar and vanilla until fluffy. Cut a small hole in the corner of a pastry or plastic bag; insert a large star tip. Fill bag with peanut butter filling. Insert tip into the top of each cupcake; fill with about 2 teaspoons filling, gradually lifting and piping a small amount of filling onto top of muffins. Refrigerate leftovers.