Preheat oven to 250 °F (121 °C) and line a large, rimmed baking sheet with aluminum foil, preferably double-lined. Additionally, have two-four large pieces of aluminum foil, the length of the racks of ribs, set aside.
In a bowl, whisk together the ingredients for the honey butter sauce. Set aside.
Prepare the ribs by removing the silver skin from the back of the ribs.
2 racks baby back ribs
If your rack of ribs are large, you can cut them in half. Place the ribs, skin-side up (meaty side down on the foil), on the prepared pieces of foil.
Evenly distribute and pour 3/4 of the honey butter sauce between the racks of ribs and rubbing it in with your hands on both sides. It's okay if it drips down the side onto the aluminum foil. You're going to fold them up and make them into pouches anyway.
Once the ribs are rubbed, fold up all sides of the aluminum foil to basically make a package with your ribs then place on the prepared baking sheet.
Place into the oven for 4 hours. During this time, DO NOT open the pouches to peek. Just let them cook.
In the meantime, whisk together ingredients for spice rub and set aside.