I followed the “classic method” in this recipe at Epicurious. They say it takes up to 1 3/4 hours, but mine took at least 3 hours to get this dark. I used my Instant Pot though, and it took me a bit to figure out how to get the thing to simmer.
If you have an Instant Pot Duo, to achieve a simmer use the Saute setting on the “Less” setting – just press Saute until that’s highlighted. If that’s too bubbly for you then try Slow Cook on More, but with mine that setting wasn’t a simmer.
