01 -
In the base of a 6-quart slow cooker, combine cream of chicken soup, French onion soup, au jus gravy mix, and 1/2 cup water. Mix thoroughly to incorporate.
02 -
Place the cubed steaks into the prepared gravy mixture, ensuring each piece is fully coated.
03 -
Secure the lid and cook on the low setting for 6 to 8 hours, until steaks are fork-tender.
04 -
Whisk together cornstarch and cold water in a small bowl to create a smooth slurry.
05 -
Stir the cornstarch slurry into the slow cooker without removing the steaks. If easier, remove steaks, add the slurry, whisk until combined, and return steaks to the pot.
06 -
Increase the setting to high and cook for an additional 30 minutes, or until the gravy reaches desired thickness. Serve immediately.