Preheat oven to 350F. Line a baking sheet with parchment paper and set aside. If you haven't yet, drain your chickpeas and reserve 3 tablespoons of the aquafaba for this recipe. Save the chickpeas and extra aquafaba for another recipe.
In a medium bowl, whisk the peanut butter, brown sugar, aquafaba, vanilla extract and baking powder until combined.
Spoon scant tablespoon-sized cookies onto prepared baking sheet, spacing cookies about 1-2 inches apart as they will expand some.
Bake cookies for 10 minutes on the bottom rack of your oven, until golden around edges. Allow to cool on the tray for 2-3 minutes before transferring to a rack to cool fully. Enjoy!
Keyword 5 ingredients or less, baking, brown sugar, flourless, gluten free, seasonal, vegan