http://userealbutter.com/2018/03/13/sous-vide-hamburgers-recipe/
https://www.seriouseats.com/recipes/2010/06/sous-vide-burgers-recipe.html
Ingredients
24 oz. ground beef
1 tsp fish sauce (worchestershire?)
1/2 tsp salt (use 1 tsp salt if not using fish sauce) + more
1 tsp black pepper + more
4 slices cheese (cheddar, swiss, etc.)
4 buns, lightly toasted
other dressings like tomatoes, lettuce, pickles, onions, bacon, etc.
1 tbsp vegetable oil or butter for finishing stove top
Method
Mix beef, salt, pepper, and fish sauce together in a bowl.
Form 4x 6oz patties, not too tightly packed, a little wider than your burger buns.
Place each patty in its own bag (ziploc is recommended over vacuum sealed), using the water displacement method
Cook your burger for the appropriate amount of time.
Remove the bags from the bath and remove the patties to paper towels. Blot the patties dry and let them rest for 10 minutes.
Season the patties with salt and pepper on both sides.
Heat your vegetable oil or butter in a skillet over high heat and sear the patties for about a minute per side.
Alternatively, you can finish the burgers over a hot grill for about a minute per side. If serving with cheese, place the cheese slice on the patty after the first flip. Serve hot..