If you’re a cookies-and-cream fan, this treat is sure to become a favorite. The cream is scraped off each chocolate cookie and used to infuse the butter and marshmallows. Once all that is uniformly melted together, work quickly to make sure it doesn’t set before you toss it with the puffed rice cereal and Oreo cookie crumbs. We topped each square with flaky salt for a treat that even adults will not be able to resist. This is a fun and easy one to make with kids, or even if you’re strapped for time but want to make something from scratch.