Preheat your oven to 350 degrees Fahrenheit and lightly oil an 8-inch by 8-inch baking dish.
Place your dry ingredients into a large bowl and mix together. Next add in the pumpkin and maple syrup and combine all of the ingredients. If it seems a little bit dry you can add a few tablespoons of water or plant milk. My puree was more moist than most canned I have gotten in the past, so I didn't need any extra liquid.
Scoop out the mixture into the prepared dish and evenly spread it out. Place uncovered into the oven and cook for 35 minutes. Let cool for about 30 minutes before cutting and enjoying! These are more of a soft bar, but I would imagine a little less wet ingredients would yield a crispier result. Perhaps an option to explore for the next round...