Use very ripe bananas with brown spots—they provide natural sweetness, moisture, and act as the binding agent that replaces eggs and flour in this minimal-ingredient recipe.

Mix bananas and peanut butter first, then gently fold in chocolate chips at the end to prevent them from breaking down and ensure pockets of melted chocolate throughout.

Mix just until combined—overmixing develops gluten and creates dense, tough brownies instead of the gooey, fudgy texture this recipe promises.

Choose semi-sweet or dark chocolate chips with higher cocoa content; they won't get lost among the banana and peanut butter flavors and create a more sophisticated, decadent result.

Check doneness with a toothpick at 18-22 minutes—it should have a few moist crumbs, not be fully clean, since the banana moisture keeps these brownies naturally fudgy even after cooling.