Preheat oven to 400º. In large mixing bowl, combine the flour, sugar, baking powder, cinnamon and salt; make a well in center. In a small bowl, combine milk, pumpkin, butter and egg; add to well in flour mixture. Add chocolate chips; stir until dry ingredients are just moistened.

Spoon mixture into greased muffin cups, filling each 3/4 full. Sprinkle 1 teaspoon nuts over each muffin. Bake at 400º for 18-20 minutes. Cool 5 minutes; remove from pans. Cool completely on wire rack.