The easiest muffins you'll ever make!
In a bowl, combine cake mix, pumpkin purée, and water with a spatula until well combined (it'll take a few minutes). Pecans or chocolate chips can all be mixed in now, with some reserved to sprinkle on top.
Preheat oven to 350 F and line a 12-cup muffin pan with cupcake liners. Spoon batter into liners, topping with more nuts or chips (if desired). Bake about 25 minutes. Cool at least 10 minutes before removing from pan. Optional icing: Whisk ½ cup powdered sugar with ½ tablespoon milk and drizzle over cooled muffins. Store in an airtight container at room temperature for up to 2 days.
Per serving: 137 calories, 0.5 grams fat (0 grams saturated fat), 33 grams total carbohydrates, 0 milligrams cholesterol, 286 milligrams sodium, 3 grams fiber, 1 gram protein.