nacho cheese sauce recipe

Ingredients: 2 tablespoons butter 2 tablespoons all-purpose flour 1 cup milk 1 1/2 cups shredded cheddar cheese (or a mix of cheddar and Monterey Jack) 1/4 teaspoon salt 1/4 teaspoon garlic powder 1/4 teaspoon onion powder 1/4 teaspoon paprika Optional: diced jalapeños or hot sauce for extra spice