Put tequila, cointreau, margarita mix and beer in a blender and mix. But whatever you do, do not add ice to the blender. For goodness sake do not ruin the world's best margarita by making it a blended drink.
Dip rims of 4 glasses in kosher salt, fill with ice and margarita.
Recipe by Talia Bunting at https://www.taliabunting.com/memorial-day-cocktails/