This is the best black bean brownie recipe I’ve tried, no oil, no sugar.
https://www.forksoverknives.com/reci...lthy-brownies/
And this website shows the nutritional content of the recipes, including fiber.
I like these pumpkin squares.
https://www.straightupfood.com/blog/...n-pie-squares/
There are others with more fiber, like these muffins with >4 grams.
https://www.straightupfood.com/blog/...berry-muffins/