Preheat oven to 400°. In a small bowl, combine Parmesan cheese and 1 teaspoon dressing mix. In another bowl, mix mayonnaise, milk and remaining dressing mix. If desired, stir in blue cheese. Refrigerate until serving.
In a large bowl, mix chicken, cheddar-Monterey Jack cheese and wing sauce. On a lightly floured surface, unroll pizza crust dough and pat into a 14x12-in. rectangle. Cut into 24 squares.
Place 1 rounded tablespoon chicken mixture on the center of each square. Pull corners together to enclose filling; pinch to seal. Place 1 in. apart on greased baking sheets, seam side down. Brush tops with butter; sprinkle with Parmesan cheese mixture.
Bake 15-17 minutes or until golden brown. Serve with dressing.