Measure out the necessary amount of millet and broth, as well as salt and (if using) butter.
Some choose to rinse their millet before cooking. This is not necessary, but you may do so if you wish.
Add the millet and broth to the instant pot or pressure cooker.
Add salt and gently stir.
Close the lid on the Instant Pot and set the valve to "sealing."
Pressure cook on HIGH for 10 minutes.
(NOTE: It will take 8-10 minutes for the pot to come to pressure before the 10 minute countdown begins.)
When the pot beeps to indicate the 10 minutes are over, press CANCEL.
Set your own timer and wait for 8 more minutes.
After those 8 minutes, use a wooden spoon to flip the valve to "venting" and release any remaining pressure.
Remove the lid and stir to fluff the millet.
Once the millet is stirred and fluffed, add the butter if you choose.
Store for later or serve warm, seasoning to taste with whatever you enjoy!