Creating Broccoli Mac and Cheese is simple if you follow these easy steps:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add the elbow macaroni and cook according to package instructions until al dente. About 2 minutes before the pasta is done, add the broccoli florets to the pot. Drain and set aside.
2. Make the Cheese Sauce: In a large saucepan, melt the butter over medium heat. Once melted, whisk in the flour and cook for 1-2 minutes until bubbly.
3. Add Milk: Gradually whisk in the milk, stirring constantly until the mixture thickens, about 5-7 minutes.
4. Incorporate Cheese: Remove the saucepan from heat and stir in the cheddar and mozzarella cheeses until melted. Add the mustard powder, garlic powder, onion powder, salt, and pepper to taste.
5. Combine Pasta and Sauce: Add the drained pasta and broccoli to the cheese sauce, stirring until well coated.
6. Prepare for Baking (Optional): If you prefer a baked version, preheat your oven to 350°F (175°C). Transfer the mac and cheese to a greased baking dish.
7. Add Topping (Optional): In a small bowl, mix the breadcrumbs with olive oil. Sprinkle the mixture evenly over the mac and cheese.
8. Bake: Place the baking dish in the oven and bake for 15-20 minutes, or until the top is golden brown and crispy.
9. Serve: Remove from the oven and let it cool for a few minutes before serving. Enjoy your delicious Broccoli Mac and Cheese!