Add noodles, water, butter and salt to the Instant Pot. Place the lid on and make sure the valve is sealed.
Cook on manual high pressure for 4 minutes.
While your pasta is cooking add milk, garlic, 2 chipotle chiles and 1 tsp of adobo sauce to a high speed blender or food processor. Blend until well combined.
When the Instant Pot timer goes off, quick release pressure right away. Pour in milk mixture and shredded cheese. Stir immediately until all is smooth and creamy. Optionally, sprinkle with a little ground chipotle powder.