Smash burger tacos bring together two of the most craveable foods in one ridiculously satisfying bite - and they work because the technique behind each half is actually sound. A ball of 80/20 ground beef gets pressed hard onto a hot skillet directly on top of a flour tortilla, creating maximum contact with the pan and triggering a deep, fast Maillard crust while the tortilla toasts and crisps from the beef fat below. The result is lacy, crispy-edged beef fused to a tortilla that holds everything together without going soggy.
This isn't a gimmick dish. The smash technique is legitimate - pressing the beef thin forces the fat to render immediately into the hot pan, creating more surface area for browning and a crispier edge-to-center ratio than any standard patty can achieve. Doing it on a tortilla instead of a bun means the grease soaks into the bread layer and crisps it rather than making it soft, which is the exact opposite problem you get with a steamed burger bun.
The toppings follow burger logic - American cheese melted directly on the hot beef, shredded lettuce, diced white onion, pickles, and a smash sauce built on mayo, ketchup, mustard, and pickle brine. You can go full fast-food reference with those classics, or push toward a more Tex-Mex build with pepper jack, jalapeños, and chipotle mayo. Either direction works because the beef and the crispy tortilla are doing the heavy lifting.
Use 80/20 ground beef - the fat content is non-negotiable here. Leaner beef won't render enough fat to crisp the tortilla or create the right crust. Small flour tortillas (6-inch) fit one smash patty perfectly and stay manageable to fold and eat.