Step 1

Place macaroni noodles, butter, water, dry mustard, salt and pepper into Instant Pot.

Step 2

Close lid, close valve.

Step 3

Cook on Manual for 4 minutes.  (If you are new to the Instant Pot, it will take time for the pressure cooker to come to pressure, before the cooking cycle begins).

Step 4

Use quick release, to release the pressure.

Step 5

Remove lid and check to see that macaroni noodles are to desired firmness.

Step 6

If they need to be cooked longer, turn the Instant Pot to Saute, and cook until they've reached your desired consistency.

Step 7

Stir in cheeses and milk.

Step 8

Serve!