Rinse and drain well the chickpeas to eliminate the salt and other flavors.
Add into a food processor all the ingredients except the almond flakes: the chickpeas, dates, oat flour, cacao powder, peanut butter, plant-based milk, baking powder, and salt.
Blend for a couple of minutes until the batter is smooth and creamy. Scrab on the sides of the food processor if needed.
Brush a brownie pan with the dimensions 8x8 or something similar with oil (I used coconut oil). Otherwise, use parchment paper. Add the batter into the pan and spread it evenly.
Add your favorite toppings (I used almond flakes).
Into a preheated oven to 175 C/350 F, insert the brownie and bake for about 35 minutes.
Let the brownie cool completely before serving. For the best result, place it in the fridge and serve the next day. Enjoy!