Chubby Boys previously went viral thanks to an excellent breakfast sandwich out of Drip Collective in the West Loop. Now, the pop-up has a smashburger operation based in Logan Square’s Split Milk that proves they aren’t a one-sandwich wonder. The highlight is The Chubby Smash—a maximalist combination of sauces, cheese, and crispy onions that fuses into a balanced flavor bomb of saltiness, tang, sweetness, and spice. Pair it with a half-off draft beer during Spilt Milk’s happy hour, or a rotating cocktail like the Erykah Baiju.