Preheat oven to 400. In large bowl combine flour, sugar, baking powder, cinnamon, and salt; make a well in the center. In a small bowl, combine milk, pumpkin, butter and egg; add to well in flour mixture. Add chocolate chips; stir until dry mixture is moistened. Spoon mixture into greased muffin cups, filling each 3/4 full. Sprinkle 1 tsp. nuts over each muffin. Bake at 400 for 18-20 minutes. Cool 5 minutes; remove from pans, completely cool on racks. This recipe makes 12.