Preheat oven to 350 F. Grease or spray a muffin tin or paper liners, if using.
In a large bowl, whisk flour, baking powder, baking soda, pumpkin pie spice, and salt until well combined.
Add pumpkin (or sweet potato) apple sauce, sugar, and maple syrup, then stir until just combined.
Spoon mixture into muffin cups 3/4 full.
Bake for 18 to 25 minutes, or until a toothpick inserted into the center comes out clean.
Transfer to a wire cooling rack.