4/20 Cannabis-infused Recipes Including Weed Milkshakes, Popcorn and Pizza On 4/20/21 at 12:01 AM EDT Today's date will be marked in any weed smoker's calendar: 4/20 is marijuana's holiday. April 20 is an opportunity to get together with friends and smoke—but if you're looking to mix things up a bit, why not try a new cannabis-infused recipe instead? From classics like gummies and brownies, sweet treats like popcorn and milkshakes, to savory dishes like pizza and gnocchi, there's no limit to the number of 4/20 dishes you can come up with. Before heading to the kitchen to whip up some cannabis-infused treats, check out Guide to Cannabutter