Place the elbow macaroni into the Instant Pot liner and then add the water and ¼ salt. Stir and lock the lid into position. Set the vent to sealing and press the Manual setting for 6 minutes.
16 oz elbow macaroni, 4 cups water, ¼ teaspoon salt
Once the Instant Pot timer beeps, release pressure manually. Remove the lid when the steam stops. If there is water left, lift liner out and drain it off carefully.
Set your Instant Pot to SOUP, and add the milk and butter, stirring until blended. The milk will cool the pasta and you will need the soup setting melt the cheese nicely.
12 oz milk, 2 tablespoon butter
Slowly stir the shredded cheeses into the hot elbow macaroni, milk, and butter. Stir until melted and blended.
8 oz cheddar cheese, 8 oz Mozzarella cheese, 8 oz Velveeta cheese
Add the dry mustard, paprika, and garlic powder. Season with salt and pepper to taste. You can keep the Instant Pot on the SOUP setting for another 30 minutes if you want. Or, you can switch it to the WARM setting. Serve hot!
1 teaspoon Mustard, 1 teaspoon Paprika, ½ teaspoon garlic powder, Salt, Pepper