Top with the seasoning pack that comes with the corned beef.
Pour 1 and 1/2 cups of water into the packaging the corned beef was in to get the last bits of flavor that stuck and pour that on top of your the beef.
Cook on high for 4-5 hours or low for 6-8 hours.
Notes
How to Cook Cabbage and Potatoes
I prefer to cook my cabbage and potatoes separately from my corned beef. To get a good flavor I boil the cabbage and potatoes with a big ladle or two of the cooking juices from the corned beef.To cook the potatoes in the crock pot add them when you have 4 hours left before serving. Then add the cabbage when you have 2 hours left before serving.
Instant Pot Directions
To cook this in the Instant Pot add the water and corned beef and cook on high pressure or manual for 90 minutes and natural pressure release for at least 12 minutes.If cooking potatoes and cabbage remove cooked meat and add veggies in and cook for 5 minutes on high or manual with a quick release.