Start by preheating your range or wall oven to 325F. Line the inside of a 6 or 7 quart Dutch Oven with aluminum foil.
Combine the ingredients for the dry rub in a small bowl. Whisk together the brown sugar, ground coffee, cocoa powder, paprika, garlic powder, chili powder, onion powder, and salt, until well homogenous.
Pat down each side of the ribs with a paper towel to remove excess moisture. Use a spoon to lift up a corner from the silver membrane, lining "underside" of the rib. Use a paper towel to grab onto it and slowly pull it off the rack.
Lather the the ribs with yellow mustard and then sprinkle on some of the dry rub to cover. Flip over the ribs and repeat on the other side with the mustard and dry rub. You might not use all of the rub mixture, that is ok.
Place the coated ribs in the prepared Dutch oven, making sure that they overlap the least possible. Secure the lid on the pot and place in the preheated oven for 2 hours.
Remove the Dutch Oven Ribs from the oven. Brush the ribs generously with your favorite BBQ sauce.
Line a baking tray with a clean piece of foil. Transfer carefully the cooked ribs from the Dutch oven, onto the baking tray.
Turn on the broil setting of your oven. Place the ribs on the oven's middle rack to that they are not too close to the broiler. Keep an eye on them and remove from the oven from the BBQ sauce starts to bubble.