Start by baking your frozen fries according to the package directions. Crispy fries are key, so avoid overcrowding the baking sheet. This ensures each fry is golden and perfect for holding cheese sauce.
Melt butter in a small saucepan and whisk in flour, cooking for about a minute. Gradually add milk and stir until the sauce thickens, roughly 5 minutes. Remove from heat, stir in shredded cheese until smooth, and season with salt and pepper.
While the fries bake, cook the bacon until crispy and chop into small pieces. Thick-cut bacon works best for a meaty crunch that stands up to the cheese and fries.
Once fries are out of the oven, immediately drizzle with warm cheese sauce. Sprinkle crumbled bacon over the top, add dollops of sour cream, and finish with chopped green onions for freshness.
Serve the loaded bacon cheese fries immediately while hot and melty. They’re perfect as a side, appetizer, or even a main snack for game night or a cozy treat.