Preheat the oven to 350 F, and line a standard muffin pan with 12 paper liners. Lightly spray the liners and the top of the pan with nonstick baking spray.
In a bowl, whisk together the pureed sweet potato, granulated sugar, brown sugar, oil, milk, eggs, vanilla and maple extracts.
Separately, sift together the flour, baking soda, salt and spices.
Add the dry ingredients to the wet, and use a fork to whisk everything together, just until moistened.
Spoon the batter into the cups; they'll be quite full, nearly to the top.