Chocolate Caramel Cupcakes

1 package chocolate cake mix
24 caramels
3/4 cup chocolate chips
1 cup chopped walnuts

Prepare cake batter according to package directions. Fill 24 greased or paper-lined muffin cups one-third full; set remaining batter aside. Bake at 350�F for 7-8 minutes or until top of cupcake appears set. Gently press a caramel into each cupcake; sprinkle with chocolate chips and walnuts. Top with remaining batter. Bake 15-20 minutes longer or until a toothpick inserted near the center comes out clean. Cool for 5 minutes; remove from pans to wire racks to cool completely. Frost with chocolate frosting. Sprinkle with additional nuts if desired.