01 - Combine cheddar, mozzarella, jalapeño, and cilantro in a mixing bowl until evenly mixed. Set aside.
02 - In a separate bowl, stir together masa harina and salt. Gradually pour in warm water, mixing until a soft and pliable dough forms. Cover with a damp cloth and allow to rest for 10 minutes.
03 - Portion dough into 24 equal pieces and roll each into a ball.
04 - Place each ball between two sheets of parchment paper and flatten into a thin round approximately 2.75 inches in diameter using a tortilla press or rolling pin.
05 - Spoon about 1 teaspoon of cheese filling onto the center of each round. Fold over and tightly pinch the edges to seal, forming a half-moon shape.
06 - Preheat vegetable oil in a deep pan or fryer to 350°F.
07 - Carefully fry stuffed chips in batches for 2 to 3 minutes per side, or until golden brown and crisp. Transfer to paper towels using a slotted spoon to drain excess oil.
08 - Immediately sprinkle fried chips with sea salt while still warm and serve at once.