Line baking sheet with parchment paper and preheat oven to 350F/176C.
Mix peanut butter, maple syrup, vanilla extract, allspice, cinnamon, cacao powder, and mashed bananas in a mixing bowl.
Add the oats, raisins, and nuts. Stir everything together until every ingredient is combined. Scoop palm-sized cookies on a baking sheet and press gently.
Bake for approximately 10-12 minutes. Add 2 minutes for a crispier texture. Allow cookies to cool on a rack.