Add the cream cheese and milk to a medium saucepan. Cook over medium heat until the cream cheese begins to soften and melt.
Add the blue cheese crumbles. Whisk often until the cheeses are melted and the sauce is pretty smooth.
Bring the sauce to a simmer and cook until thickened. Stir constantly to prevent the sauce from scalding. Remove from the heat and set aside while you prepare the other ingredients.
Assembly
Add a layer of kettle chips to a serving platter. Spoon about half of the blue cheese sauce over the chips.
Stack more chips over the first layer. Drizzle with more blue cheese sauce, to taste.
Sprinkle the bacon, blue cheese crumbles, and chives over the top of the nachos. Serve immediately.
Notes
You can adjust the amount of each topping to your taste. I like a good amount of blue cheese crumbles on my nachos.Kettle chips are a must for this recipe. You need a sturdy chip to stand up to the sauce and toppings. You could probably get away with original Ruffles, but Lays would break too easily.