1. Cook the Beef: Heat a large skillet over medium-high heat. Add the ground beef and chopped onions, breaking up the beef as it cooks until browned and the onions are translucent, about 5-7 minutes. Stir in garlic powder, onion powder, Worcestershire sauce, mustard powder (if using), salt, and pepper. Cook for another 2 minutes until everything is well combined. Remove from heat and let cool slightly.
2. Prepare the Filling: Once the beef has cooled, mix in the chopped pickles and shredded cheddar cheese.
3. Assemble the Egg Rolls: Lay an egg roll wrapper on a clean surface with one corner pointing towards you. Place about 2 tablespoons of the beef mixture on the wrapper, closer to the corner nearest you. Fold the corner over the filling, then fold in the side corners, and roll tightly, ensuring the filling is securely enclosed. Use a dab of water to seal the final corner of the wrapper if needed.
4. Fry the Egg Rolls: Heat the vegetable oil in a large skillet over medium heat. Once hot, fry the egg rolls in batches, turning occasionally, until they are golden brown and crispy, about 2-3 minutes per side. Drain on paper towels.
5. Serve: Serve the cheeseburger egg rolls hot with Wahlburgers signature sauce or ketchup for dipping.