Check the back of the ribs for the thin white membrane. If present, slide a butter knife underneath it, grip with a dry paper towel, and pull it off in one piece.

Mix paprika, garlic powder, onion powder, chili powder, salt, and black pepper in a small bowl. Rub the mixture all over both sides of the ribs, pressing it in gently.

Pour 1 cup of water into the Instant Pot inner pot and place the metal trivet inside.

Stand the ribs upright on the trivet with the bones pointing up and down. Lean them against the wall of the pot. Curve the rack to fit or cut in half if needed.

Lock the lid and set the steam release valve to sealing. Pressure Cook on High for 25 minutes for baby back ribs or 35 minutes for spare ribs.

The Instant Pot will take roughly 10 to 15 minutes to come to pressure before the timer starts. When cook time ends, let pressure naturally release for 15 minutes, then move the valve to venting. For spare ribs, allow a complete natural release without touching the valve.

Set the oven broiler to High. Transfer ribs to a foil-lined baking sheet. Brush with BBQ sauce and broil 6 to 8 inches from the element for 3 to 6 minutes until sauce bubbles and edges just begin to darken. Watch closely.

Slice between the bones and serve immediately with extra BBQ sauce on the side.