Preheat oven to 350 F. Line a 9x9 baking pan with parchment paper. In a food processor, add the beans and pulse until they're broken up. Then, put in the peanut butter, almond flour, date or maple syrup, baking soda and apple cider vinegar and process until everything is mixed together well.
Stir in the chocolate chips. You can also pulse a few times in the food processor. Then spread the batter evenly throughout the pan. Top with a few more chocolate chips if desire. Place it in the oven and bake for 25 minutes. When it's done baking, allow it to cool for 15-20 minutes before serving. Store leftovers in the fridge for up to 5 days.