How Long You Should Marinate Carne Asada - Tasting Table
Briefly

"I like to marinate beef refrigerated overnight but not longer than 24 hours. A dry rub marinade can go a bit longer - up to 48 hours."
"Your carne asada marinade does two important things: It seasons the meat by letting salt penetrate through the steak, and it tenderizes by having the salt and acid break down the muscle proteins."
Read at Tasting Table
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