Fill a large pot over medium-high heat with vegetable oil until the oil is 2 inches deep. Oil should be around 350 degrees F.
In a mixing bowl, combine cream cheese, garlic powder, sugar and green onion.
Place wonton wrappers on a clean, flat surface.
Drop a teaspoon of cream cheese mixture in the middle of each wonton wrapper.
Beat egg and brush the edges of the wonton wrappers with egg.
Pinch the corners of each wonton wrapper together in the center.
Place 6-8 wontons at a time in the hot oil, turning them as needed, until evenly browned (about 3-5 minutes).
Carefully remove wontons from hot oil and place on a plate covered with a paper towel to absorb excess oil.
Serve with sweet and sour sauce.
