Preheat oven to 350°F and position oven rack in the middle.
Beat together the wet ingredients: oil, maple syrup, eggs, milk, and pumpkin.
In a separate bowl, combine the dry ingredients: ground flaxseed, baking soda, spices, flours, and oats.
Fold wet and dry ingredients together, then portion into muffin tin. Sprinkle each with additional oats, if desired.
Bake five minutes, then reduce oven temp to 325° and bake an additional 20-25 minutes, until a tester inserted in the center comes out clean.