Bake the frozen French fries according to the package directions until golden and crisp. Sprinkle with salt, pepper, and garlic powder.

In a small saucepan, melt the butter over medium heat. Stir in the flour and cook for about 1 minute until lightly golden.

Slowly whisk in the half-and-half and continue stirring until the mixture thickens, about 3-4 minutes. Gradually add the cheese and stir until the sauce is smooth. Season with salt and pepper.

Place the fries on a serving platter and drizzle the warm cheese sauce evenly over the top. Garnish with parsley if using. Serve immediately and enjoy!