Prep the brussle sprouts by peeling off the outer leaves, cutting off the stem and slicing in half.
Place brussle sprouts, sugar, smoked paprika, ground mustard seed, garlic, onion powder, white pepper, salt and avocado oil in a bowl. Using tons or your hands make sure each brussle sprout is coated with spices and oil.
Place everything in your air fryer and cook for 15 minute on 375. The brussle sprouts should have golden brown char.