01 - In a large mixing bowl, thoroughly combine shredded chicken breast, buffalo wing sauce, mozzarella cheese, blue cheese if using, chopped celery, green onions, garlic powder, and black pepper.
02 - Place an egg roll wrapper on a clean work surface with one corner facing you. Add 2 to 3 tablespoons of chicken filling to the center.
03 - Fold the bottom corner over the filling, then fold over both sides. Roll tightly, brushing the top corner with beaten egg to seal the edge.
04 - Continue filling, folding, and sealing until all wrappers and filling are used.
05 - Pour enough vegetable oil into a deep-frying pot to reach 2 inches in depth. Preheat oil to 350°F.
06 - Fry egg rolls in batches for 3 to 4 minutes, turning as needed, until golden brown and crisp. Remove and drain excess oil on paper towels.
07 - Serve egg rolls warm with ranch or blue cheese dressing for dipping.