Put 1.5 cups of water into the Instant Pot. Place a steamer rack in the pot. Place the brussels sprouts and cranberries in a steamer basket and place the basket on the rack. Alternatively, if your steamer basket has little legs to hold it off the bottom of the pan, omit the steamer rack.
Close the lid and set the Instant Pot to cook on HIGH PRESSURE for 3 minutes. At the end of the cooking time, release all pressure immediately.
Tip the brussels sprouts and cranberries into a bowl. Add in the melted butter, marmalade, salt, and cayenne and toss to mix. Serve hot.
If you're not a fan of the spice, you can opt to leave out the cayenne pepper. However, I really recommend using it, as it pairs perfectly with the sweetness of the cranberries and orange marmalade.
The toasted walnuts are completely optional, but they add a wonderful crunch to the dish. Simply garnish the finished sprouts with the walnuts.
Do use a steamer basket. Putting them in the pot with water was a total disaster
Do use fresh Brussel Sprouts. This was way overcooked with frozen Brussel Sprouts
Do not try to cook it with the sauce in the sprouts. Yup, I totally got a burn message trying to do that. By the way, if you're curious why you get a Burn Message with your Instant Pot, you may want to watch this video.