Season the chicken with salt and pepper and seal in a vacuum seal bag along with the butter.
Cook for 2-4 hours in the sous vide water bath.
Remove, remove from bag and serve with the balsamic cream sauce. **brown in a cast iron skillet over medium if preferred (optional, not required).
Balsamic Cream Sauce:
Heat the olive oil in a small/medium skillet over medium heat. Add the garlic and sauté for 2-3 minutes.
Add the thyme, salt, pepper, stock and cream and cook down until thickened, about 3-5 minutes.
Stir in the vinegar. Remove from heat, adjust salt to taste if needed and serve.
Notes
Get as much air out of the bag as possible to prevent floating. Using a vacuum sealer works best for this, but you can also use the water displacement method.
If the bag floats use one of these sous vide weights or weight it down with something to ensure the chicken cooks evenly.
Adjust the sauce to taste at the end. You may need to add additional salt to your own taste.
Browning the chicken is optional. It can add extra flavor to the outside, but is completely unnecessary to have an amazing dish.
Cooking the chicken for 4 hours will provide the best, most tender results, however, you can cook the thighs anywhere between 2-6 hours and they will be fully cooked through and juicy.
Always season the chicken before putting it in the water bath to ensure it soaks up all the flavor while cooking.
If you are making these in advance, plunge them directly in an ice bath for 20-30 minutes when done cooking. Then store in the fridge or freezer.
It's ok if the chicken is a little pink in the middle. It is fully cooked and safe to eat.