Broccoli Cheddar Baked Potato

Name: Broccoli Cheddar Baked Potato
Ingredients: 4 russet potatoes (washed); 2 tbsp butter (unsalted); 2 tbsp all purpose flour; 1 cup milk; 1/4 tsp onion powder; 1/4 tsp garlic powder; 1 cup broccoli (steamed, chopped small); 1 cup mild cheddar cheese (shredded); salt (to taste); pepper (to taste)