Melt the Base: In a large skillet over medium heat, add 16 oz cream cheese and 8 oz shredded Pepper Jack cheese. Cook for 3-5 minutes until both cheeses are melted and the mixture is smooth.
Add the Corn: Lower the heat to medium-low. Stir in 2 cans (15 oz each) drained whole kernel corn and ½ cup milk. Then, add 1 handful of minced cilantro and 2 Tbsp tajin seasoning. Mix well, and cook until the dip thickens and begins to bubble, which should take about 7 minutes. Remember to stir frequently to prevent sticking.
Finish the Dip: Mix in ½ cup sour cream and continue to stir until well combined. Remove from heat and garnish with crumbled queso fresco. Squeeze in the juice from ½ lime for a burst of flavor. If desired, sprinkle with additional tajin seasoning and cilantro before serving.