1. Measure the beef stock into the Instant Pot. Put a steamer basket on top of the liquid.
2. Add the sliced onions to the steamer basket. Sprinkle with the salt and drizzle with the melted butter. Toss it all gently with your hands.
3. Set the valve to Sealing and set the Instant Pot to pressure cook on high for 3 minutes. After it has finished the 3 minutes, do a quick release by turning the valve to Venting.
4. Once the steam has all escaped and the button has dropped down, remove the lid. Strain the onions through sieve with a bowl placed under it (so that you catch those delicious juices!). Note that the onions will be soft and tasty now. You can totally stop here. Or…
5. Sprinkle the onions with the brown sugar and baking powder. Toss gently.
6. Set the Instant Pot to Sauté on high. Add the unmelted butter. Once melted, add the onions. Pat them down.
7. Cook the onions without disturbing them. Every couple of minutes, scrape some up and see if there is browning underneath. If so, give them all a stir, being sure to scrape any brownings from the bottom.
8. Continue to cook and stir as directed until onions have reached desired color, about 10-12 minutes.

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