Preheat oven according to French fries package instructions, Line a baking sheet with parchment paper, aluminum foil, or a silpat mat.
Combine all seasonings in a small bowl.
1½ teaspoons light brown sugar, ¼ teaspoon garlic powder, ¼ teaspoon onion powder, ¼ teaspoon smoked paprika, ¼ teaspoon salt, ⅛ teaspoon chili powder, ⅛ teaspoon black pepper, ⅛ teaspoon cayenne pepper
Arrange French fries in a single layer on the prepared baking sheet. Sprinkle the seasoning mix across the top, but save about ½ a teaspoon for later. Toss to coat.
1 package frozen French fries
Cook fries according to package instructions.
While the French fries are cooking, prepare your cheese sauce. Start by melting the better in a small pot over medium-high heat.
2 tablespoons butter
Whisk in flour, then cook for one minute to thicken. Then whisk in the milk.
2 tablespoons all-purpose flour, ⅔ cup milk
Slowly add the shredded cheddar cheese in small batches, stirring continuously as the cheese melts, until all of the cheese has been incorporated. Place on a warming burner, or turn you burner to the lowest setting, to keep the sauce warm. (Make sure it doesn't burn!)
2 cups cheddar cheese
Serve the French fries with the cheese sauce and the ranch dressing drizzled over the top. Finish by sprinkling the remaining seasoning on top.
3 tablespoons ranch dressing