Step 3: Prep and apply dry rub.
Preheat your oven to 300 F.
Clean your ribs by running them under warm water and patting dry.
Now - find a suitable dry rubbing area. I used a sheet of aluminum foil, but you could do parchment paper or a cutting board. Anything to give you a clean surface that'll make cleanup easier.
You're going to apply 1/4 C of dry rub on each side of the ribs. (I used a 1/4 cup scoop to dump it onto the ribs so there was no cross-contamination and I could store the rest of the rub with no worries!) Really work it in with your hands until everything is covered.
Then, place it on the rack bone side down.
(Note that you can line the baking sheet with aluminum foil as well for quicker cleanup... something I chose not to do because I always end up washing it like crazy anyway. :)