Melt the butter in a large pot over medium heat. Whisk in the flour.
4 tbsp butter, ¼ cup flour
Gradually pour in the milk while whisking continuously.
2 cups whole milk
Whisk in the onion and garlic powders, salt, and pepper.
¼ tsp onion powder, ¼ tsp garlic powder, ½ tsp salt, Pinch of pepper
Take the skillet off the heat. Then, add in the cheese and stir until completely melted and incorporated.
16 oz sharp cheddar cheese
Taste, and add more salt if needed.
Pour over cooked broccoli.