Copycat Cosmic Brownies

"When I was in school, my typical meal was a toaster pizza (an actual pizza made in the toaster). Oh how I miss those! I also usually grabbed either zebra cakes or cosmic brownies from the vending machine. No matter how hard I try I can’t ever recreate that toaster pizza. But I can create an even more delicious version of Cosmic Brownies. My version is thick and ultra fudgy. They’re also made with m and ms instead of unidentified candy bits (unless you’re into that)."