How Long to Leave Dry Rub on Ribs Before Cooking?

Last Updated:
September 4, 2024

Unless it’s salt, it doesn’t really matter much.

There isn’t much of a difference in taste or bark between ribs that “sweat” for 1-15 minutes OR 24 hours.

Why Only Salt Really Matters

Salt is capable of penetrating meat, enhancing flavor, and tenderizing.

The rest of the ingredients barely penetrate – instead they sit on the surface and create a crust OR bark.

221 ribs on smoker

This includes stuff like:

  • Paprika,
  • Sugars,
  • Pepper,
  • Garlic powder/granulated
  • Onion powder/granulated
  • etc.

If you’re salting or applying a dry rub that contains salt, you can dry brine 2-24 hours in advance.

This gives the salt enough time to actually penetrate the meat.

In experiments by Greg Blonder, he found that Salt was capable of penetrating meat:

  • 30 minutes = 0.11 – 0.15 inches
  • 1 Hour = 0.19 – 0.23 inches
  • 2 Hours = 0.27 inches
  • 24 hours = 0.66 inches

You could also opt to wet brine in a salt solution too.

Why Do People Say to “Sweat” the Rub onto the Meat Then

This is because the salt in the rub pulls water out of the meat.

This water then re-hydrates your rub (which are dehydrated spices) and then the water reabsorbs back into the meat because of the salt.

rib rub sweating into meat

The rub will now want to “stick” to the meat because it’s wet.

BUT again, this doesn’t matter.

You could literally put rub onto the meat while it’s in the smoker and it won’t matter. Bark will still form, it won’t wash off – just allow it to smoke for several hours.

After several hours take your finger, dab the ribs and if any rub sticks to your finger, they need to keep smoking.

If you dab, no rub sticks to your finger, and the bark is dark, it’s likely time to wrap.

If You’re Concerned About Dry Rub Falling Off Your Ribs, Use Mustard or Water from the Get-go

The mustard can help to bind the ingredients to the surface like glue – water does the same thing.

I don’t really find that a lot of these ingredients “fall off” though.

The only one that can tend to fall off is something like Turbinado sugar – but not on ribs since they lay flat.

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Dylan Clay
Dylan Clay is a pitmaster based in New Hampshire, with over 17 years of experience in grilling, smoking, and dehydrating meat. Throughout this time, he has worked with nearly every cut of meat. In 2019, he launched the Barbecue FAQ website to share his extensive knowledge about all things meat, aiming to assist others in making better barbecue at home.

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