Is it okay to marinate brisket for 48 hours? My wife and I had planned to cook a brisket for dinner tonight. Our plans have changed and we would now like to cook and eat the brisket tomorrow night instead. Yesterday, before we knew our plans would change we put the brisket into a marinade. Currently, our 3 pound brisket is in the refrigerator sitting in a bath of the low sodium version of Claude's BBQ Brisket Marinade Sauce.

Is it okay to continue to let the brisket marinade until we cook it tomorrow? Do we need to cook it today and serve the brisket as leftovers tomorrow? Or do we need to get the brisket out of the marinade, but still cook it tomorrow?
Generally, yes, you can leave a brisket in a marinade for 48 hours or even longer. The exception would be a marinade that is very highly acidic, but not that's not likely to be a problem with a commercial marinade.