
Add dry macaroni noodles, water, onion powder, dry mustard, seasoning salt, pepper and butter to the instant pot.
Set timer for 6 minutes on high pressure.
Release pressure once completed, there will be water in the bottom – do not drain.
Stir in the cream cheese to melt. Add the ¼ cup milk slowly until blended.
Stir in the cheddar and parmesan cheese. Add the remaining ½ cup milk until the desired consistency is reached. You may not need the entire amount of milk.