If there's one thing peanut butter fans know, it's that the combination of sweet and salty is irresistible. And now, M&M's is bringing that magic to the freezer aisle with a brand-new treat that's guaranteed to make your taste buds happy.

You’re probably already adding a pinch of salt to your cookie dough or sprinkling flaky sea salt over baked cookies to balance the sweetness. That’s the purpose of miso in cookie dough, to help balance sweetness and bring just a hint of umami that heightens and enhances all the other flavors.

There a few reasons why we still crisscross the top of peanut butter cookies—and why it isn't totally necessary.