Using the sauté feature, add butter and garlic and sauté for 2-3 minutes.
Add the diced potatoes and broth.
Place the cover on the Instant Pot, close the valve, and set the timer for manual (high) for 6 minutes.
Once the pot beeps allow the pressure to release.
Using the immersion blender, blend until smooth. Once blended add milk, half and half, and cheese. Mix well.
Add salt and pepper to taste.
Garnish with bacon, sour cream, and bacon if desired.