Spray the inside of the slow cooker with nonstick cooking spray, then add 3 pounds chuck roast cut into 1x2-inch pieces.
Top the beef with ½ cup unsalted butter and 1 (1-ounce) packet onion soup mix. Cover and cook on LOW for 6-8 hours or on HIGH for 3-4 hours, until the beef is tender and easily shreds.
Notes
Storage Instructions
Fridge: Store leftovers in the refrigerator in an airtight container for up to 7 days.
Reheat: Microwave in 30-second intervals until heated through.
Make Ahead: You may add the ingredients to the slow cooker the night before cooking it, store it in the fridge, then cook as directed the next day.
Freezer Meal: Add the beef, sliced butter, and onion soup mix to a large freezer bag. Freeze for up to 3 months. To cook from frozen, dump the contents of the bag into the slow cooker and cook on LOW for 8-9 hours, or on HIGH for 4-5 hours. Alternatively, you may let it thaw in the refrigerator overnight and cook as directed in the recipe card.