Preheat oven to 375 degrees F. Line a 9x9 square baking pan with parchment paper.
In a large bowl, mash ripe bananas. Add the vanilla, almond milk, and peanut butter and whisk until well combined.
Add the oats, ground flaxseed, cinnamon, baking powder, and salt. Mix with a spatula until just combined.
Fold in the dates, peanuts, and chocolate chips.
Pour batter into the prepared pan. Top with more chocolate chips and peanuts. Bake for 25-28 minutes or until middle is set and lightly golden brown. Let it cool for 10 minutes, then serve warm. If you want it more like bars, let it cool longer. It will firm up more as it cools.
Store leftovers in an airtight container in the fridge. Reheat in the microwave with a splash of milk or enjoy cold.