Step 1

Bake the french fries according to the package directions.

Step 2

In a small saucepan, melt the butter.

Step 3

Whisk the flour into the butter and cook, while whisking, until the raw flour smell disappears, about 1 minute.

Step 4

Slowly add the milk to the flour mixture and cook, while stirring, until the mixture thickens slightly, about 5 minutes.

Step 5

Transfer the sauce from the heat and stir the cheese in until completely melted and thoroughly combined.

Step 6

Season the sauce with the salt and the pepper.

Step 7

Immediately drizzle the baked fries with the cheese sauce.

Step 8

Sprinkle the fries with the bacon and drizzle with the sour cream.

Step 9

Sprinkle the fries with the green onions.

Step 10

Serve.