01 - Preheat oven to 400°F. Line a large rimmed baking sheet with parchment paper or foil for easy cleanup.
02 - In a medium mixing bowl, toss the shredded chicken with Buffalo wing sauce until every piece is evenly coated and glistening.
03 - Spread tortilla chips in a single even layer across the prepared baking sheet, slightly overlapping for structural integrity.
04 - Distribute the sauced Buffalo chicken evenly over the chip layer. Scatter shredded cheddar and Monterey Jack cheese across the top, ensuring full coverage.
05 - Sprinkle diced red onion, sliced jalapeños (if using), and half of the chopped cilantro over the cheese layer.
06 - Bake for 8 to 10 minutes until the cheeses are fully melted, bubbling, and lightly golden at the edges.
07 - Remove from oven and immediately top with crumbled blue cheese, diced tomatoes, generous dollops of sour cream, sliced green onions, and the remaining cilantro.
08 - Drizzle with additional Buffalo sauce if desired and serve right away with ranch or blue cheese dressing on the side. Nachos are best enjoyed immediately while warm and crisp.