Cut the chuck roast into cubes.
Make them about 2 inches each.
Trim excess fat if you prefer.
Pat the pieces dry with paper.
This helps seasoning stick better to meat.
Mix all dry spices in a bowl.
Coat each meat cube generously with seasoning.
Press the spices into the meat firmly.
Let it sit for 15 minutes minimum.
Preheat your oven to 250°F now.
Line your baking sheet with foil completely.
Arrange meat cubes on the sheet evenly.
Cover tightly with another foil layer.
Bake for 2 hours without peeking inside.
Combine barbecue sauce, broth, and vinegar.
Stir in butter until it melts smoothly.
Keep this sauce warm and ready.
Remove foil from the meat carefully.
Brush sauce generously on all pieces.
Increase oven temperature to 350°F now.
Bake uncovered for 30 minutes more.
Brush with sauce every 10 minutes.
Turn oven to broil setting for finish.
Broil for 3-5 minutes until edges darken.
Watch closely to prevent actual burning.
Remove when edges look caramelized perfectly.