Is Smash burger made with seed oils?
Usually seed oils
Usually higher in seed oil than a plain burger, mostly from the sauce
The smashing technique itself does not add oil, but most smash burger spots load on a mayo-based special sauce. The tracker estimates around 10g of PUFA per double smash burger with sauce, versus roughly 3g for a plain patty.
How to keep it seed-oil-free
Ask for it without the sauce, or with just mustard and ketchup on the side. A plain smash burger is a much cleaner order than the loaded version.
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