01 - In a large mixing bowl, blend the shredded chicken with buffalo wing sauce, mozzarella, blue cheese if using, celery, green onions, garlic powder, and black pepper until evenly combined.
02 - Lay one egg roll wrapper on a clean surface in a diamond shape. Spoon 2 to 3 tablespoons of the chicken mixture onto the center of the wrapper.
03 - Fold the bottom corner over the filling, then tuck in both sides before rolling tightly. Brush the top corner with beaten egg to ensure a secure seal.
04 - Repeat the filling and rolling process with the remaining wrappers and chicken mixture.
05 - Pour enough vegetable oil into a deep-frying pot or deep-fryer to reach a depth of 2 inches. Heat to 350°F.
06 - Fry the egg rolls in small batches for 3 to 4 minutes per batch, turning if necessary, until golden and crispy. Drain on paper towels.
07 - Present warm egg rolls with ranch or blue cheese dressing on the side for dipping.