01 - Preheat oven to 400°F. Line a large baking sheet with parchment paper if desired.
02 - In a medium mixing bowl, toss the shredded chicken with Buffalo wing sauce until evenly coated throughout.
03 - Arrange tortilla chips in an even layer across a large baking sheet or ovenproof platter.
04 - Scatter the Buffalo chicken evenly over the chips. Sprinkle cheddar and Monterey Jack cheese over the chicken layer.
05 - Distribute diced red onion, jalapeños if using, and half of the chopped cilantro across the nachos.
06 - Bake for 8 to 10 minutes until the cheese is fully melted and bubbly.
07 - Remove from oven and top with blue cheese crumbles, diced tomatoes, dollops of sour cream, sliced green onions, and remaining cilantro.
08 - Drizzle with extra Buffalo sauce if desired. Serve immediately with ranch or blue cheese dressing on the side.