Cook the ground beef in your cooking pan on the stovetop until done. Don't add any fat while cooking. Once the ground beef is cooked, drain out all of the fat.
Transfer the cooked ground beef to a plate. Pat the beef dry with a towel to soak up as much of the remaining fat as you can.
Transfer the ground beef on top of a piece of parchment paper on your baking sheet. Spread the pieces out in as thin of a layer as possible to promote even baking. Dehydrate the ground beef in the oven at 200 degrees for 3-4 hours. You may have to rotate the pieces while cooking. I usually swirl everything around with a fork every 30 minutes or so or when I remember. The pieces should be hard and crunchy when done. I typically keep an eye on mine at about the 2-hour mark. Mine was done right around 3 hours.
Once the beef is fully dehydrated, remove the beef pieces from the oven and let them cool.