Preheat the oven to 375°F (190°C). Line a baking sheet with foil (parchment paper).

Add the brown sugar, onion powder, garlic powder, mustard powder, paprika, cayenne and smoked paprika to a small bowl; mix and set aside.

Drain and thoroughly rinse the jackfruit. Using your hands, squeeze any excess moisture from the jackfruit, remove the buds and discard. Add the jackfruit to a large bowl along with the vegan ground beef, onions, vegan Worcestershire, liquid smoke and the spice mixture. Using a wooden spoon, mix until well incorporated, then add to the foil-lined baking sheet and shape into a large rectangle. Using a butter knife, create four to five lines in the mixture, only slicing one quarter of the way through the mixture to create your rib shape.

Bake, uncovered, for 1 hour and 10 minutes. Remove from the oven and spread the BBQ sauce over the ribs. Return the pan to the oven and bake for another 20 minutes. Fully cut through the ribs along the lines you made in the mixture. Separate into ribs and serve.