In a large bowl, cream together cream cheese, sour cream, Mexican cheese, green chiles, jalapeño and Parmesan cheese. Pour into the prepared dish.
16 oz. cream cheese, ¼ cup sour cream, 1 cup Mexican cheese blend, 4-8 oz. chopped green chiles, 1-2 jalapeños, ribs and seeds removed, ½ cup grated Parmesan cheese