Technically, yes. Can you use a loaf pan to make a cake? Sure. But your cake will be tall, weirdly shaped, and have a slump. Can you use a round pan for brownies? You can, but you’ll lose those charming edge pieces that everyone fights over.
The moral of the story is: match your pan to your project. You wouldn’t wear flip-flops to climb a mountain, so don’t use a pie plate to bake a batch of cookies. Your cookies will just be a giant, sad cookie puddle. That’s not a “rustic cookie,” that’s a crisis.
