Butter a 12-inch cast iron skillet or a 9x13-inch baking dish; set aside.
In a medium mixing bowl, mix together cream cheese (12 ounces) and mayonnaise (1 cup) until smooth and well combined.
Add chili powder (1 1/2 teaspoons), ground cumin (1 teaspoon), sour cream (3/4 cup), green chilies (1 can), a jalapeno pepper (1), lime juice (2 tablespoons), garlic (3 cloves), 1 cup jack cheese, green onion (1/2 cup), Cojita cheese (1/4 cup), Mexican corn (1 or 2 (11-ounce) can), and yellow corn (1 can). Mix until well combined.
Spoon mixture into prepared pan. Sprinkle top with remaining 1 cup pepper jack cheese. Bake in preheated oven for about 15-20 minutes or until cheese is hot and bubbly.
Garnish with 2 tablespoons Cojita, cilantro,1/4 cup red onion, and 1/4 cup green onion. Serve with tortilla chips.