Start by preheating your oven to 350 F.
Next, open your can of chickpeas and drain and rinse them well. Don't forget to save the liquid - you can use it to make aquafaba!
Once your chickpeas are rinsed, add them to a food processor along with your peanut butter, maple syrup, cocoa powder, vanilla, baking powder and baking soda.
Pulse well, until your ingredients form a thick batter, then add in the milk and pulse again, until the batter is as smooth as possible.
Next, add in your chocolate chips.
Once your batter has formed, grease a 9x4 loaf pan (or a square 8x8 pan, for thinner brownies) and transfer your batter into it.
Add your remaining chocolate chips on top.
Bake your brownies for 30-35 minutes, until a toothpick comes out clean.
Once your brownies are done, let them cool for 10 minutes before slicing. Then slice, serve, and enjoy!