Preheat your smoker to 250°F using your favorite smoking wood such as apple, oak, or hickory.
Slice the chuck roast into 1.5–2 inch cubes. Smaller cubes tend to dry out faster. Keep the pieces as even as possible for consistent cooking, but don’t worry if a few end up irregular.
Season the cubes generously on all sides. Use our beef rub recipe, a basic SPG rub or layer in your favorite BBQ rub.
Arrange the cubes evenly on the smoker grate or a wire rack with a little space around each piece so the smoke can circulate. Close the lid and let them smoke undisturbed for 1 hour.
After the first hour, spritz the cubes with a 50/50 mix of beef broth and water. Continue spritzing every 30–45 minutes or whenever the meat starts to look dry.
Smoke the cubes for about 3 hours total, until the bark has set and they are dark and crusty. Internal temperature will usually be between 150–175°F at this point.
Transfer the cubes into a foil pan (or double wrap them in heavy-duty foil). Add a few pads of unsalted butter and a drizzle of honey then cover tightly. To speed things up, you can raise the smoker temperature to 300°F at this stage.
Return the pan to the smoker and cook for another 2 hours, until the cubes are 200–205°F internal and probe tender. A thermometer should slide in with little resistance, and the cubes should feel soft but not fall apart.
Remove the cover, stir in your favorite BBQ sauce, and return the pan to the smoker uncovered for 20–30 minutes. This allows the sauce to reduce slightly and become tacky on the meat.
Serve the burnt ends hot either piled onto a platter with the pan juices poured over the top, or in sandwiches with coleslaw and an extra drizzle of sauce.