Heat oven to 325°F.
Mix 1–2 tablespoons Momofuku Chili Crunch, 2 tablespoons light brown sugar, 2 tablespoons Kosher salt, and 1 teaspoon black pepper in a small bowl. Rub all over the ribs, front and back, then wrap ribs tightly in aluminum foil.
Bake for 2 hours and 30 minutes until the ribs are nearly falling off the bone. Remove from the oven.
When you are ready to serve, baste Momofuku Sweet & Savory Korean BBQ Sauce all over one side of the ribs with a brush.
For the grill: Heat your grill to medium high, then place the basted side of the ribs down onto the grill. Baste the other side and cook for 5 minutes, then flip. Repeat until your ribs are charred and warmed through.
For the oven: Heat your oven to 450°F. Baste both sides of the ribs and place them on a large sheet pan. Roast for 10–15 minutes until the ribs are beginning to char.
Serve with more reserved sauce.
