Pic by Cooking Kitty on allrecipes.com
For 6 servings:
1 cup water
1 (.7 ounce) package dry Italian-style salad dressing mix
1 (1 ounce) package ranch dressing mix
1 (.75 ounce) packet dry brown gravy mix
1 (3 pound) boneless beef chuck roast
Whisk together the water, Italian dressing mix, ranch dressing mix, and brown gravy mix together in a bowl until smooth. Place the beef roast into a slow cooker, and pour the sauce over top.
Cook on Low until the roast is easily pierced by a fork, 6 to 8 hours.