Peanut butter brownies from mix take classic brownies to the next level with rich chocolate and creamy peanut butter swirls ...

Completely cool brownies on rack, at least three hours. 14. Cut into squares and serve. If not serving immediately, do not cut brownies. Whole brownie cake can be wrapped in plastic wrap then foil, ...

Refrigeration: If you want to extend the shelf life, you can refrigerate sourdough brownies. Place them in an airtight container or wrap them tightly in plastic wrap. This can keep them fresh for ...