Place the stainless steel steam rack in a 6 quart Instant Pot. Pour 1 cup of water in the Instant Pot, then place the four ears of corn on the cob (*husk on or off) on the rack.
Close the lid and seal the pressure valve to closed. Cook at "steam" High Pressure for 3 minutes.
Once the corn is done cooking and the Instant Pot starts to beep, carefully do a quick release on the pressure valve. Open the lid carefully, and remove the corn. Serve immediately with toppings of choice.
Husks On or Off - I have cooked the corn with both husk on and husk off. I'll be honest--I didn't see any difference other then it's a smidge easier to clean the corn and remove the husk and hairs when they are already cooked! You can use the same exact cooking time for either way.
Keeping Warm - Once your corn is done, drain the water, add a stick of butter and toss the corn in the butter. If you are entertaining you can turn on the "keep warm" setting and let the corn sit for up to an hour. During this time it can soak in the butter. Don't want to add butter. Then simply keep it on the trivet!
Toppings - You can enjoy the corn hot out of the Instant Pot or top it with butter, fresh herbs, or even bacon. The sky is the limit as far as the toppings you can select for your corn!
Pressure - Remember, any time you cook with an Instant Pot it takes the same amount of time to come to pressure as it does to cook. So for this recipe it will take 3-4 minutes to come to pressure, the screen will read "on" and then once it hits pressure then it will take the 3 minutes to cook.