Cheaper than McDonald’s and more local, Mostaza sits in Terminal A
In EZE’s Terminal A, Mostaza is the Argentine fast-food answer to McDonald’s and Burger King, with combo meals that usually ring in a bit cheaper than the golden arches next door. Expect classic burger, fries, and soft drink combos on the board, plus some Argentina-leaning toppings and seasoning that give the patties a different flavor than US chains. It’s airside after security, so you can order and walk straight to your gate in A without backtracking.
Figure on budget pricing for the airport: this is a $ tier spot but still more expensive than a city branch in Buenos Aires, according to several Google reviews. Rating hovers around 3/5, which feels right: it’s edible, fast-ish food, not a destination. Combo meals with burger, fries, and a soft drink line up roughly with what you’d pay at the McDonald’s in the same terminal, but Mostaza usually comes out a little lower.
Menu layout mirrors other chains: you’ll see numbered combos on overhead screens, sides like fries and maybe nuggets, plus bottled water and soft drinks in 500 ml sizes. Locals call out the Argentine-style toppings and seasoning on some burgers, so if you want something that tastes less “US import,” pick one of the house specials instead of the plain cheeseburger. A few reviewers say it’s often less crowded than the McDonald’s in A around common peak times like 19:00–21:00.
Complaints line up with typical fast food gripes: multiple reviews mention slow service even when only five or six people are ahead in line, and a handful report fries arriving lukewarm or outright cold. Regulars say they check the fry station and ask staff for a fresh batch if what’s ready looks like it has been sitting more than a few minutes. Seating is limited to a small cluster of tables, so many people grab their tray and carry burgers and drinks back to gates near the mid-A pier.
Tip: if your boarding pass shows a tight sub-45-minute window, order to go, skip the fries, and stick to a single burger combo so you’re not waiting on another cooked-to-order item.