Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper or lightly greased foil.
Steam the broccoli florets until they’re tender-crisp, which should take about 3-5 minutes. Let them cool, then chop them up nice and fine—you can even throw them in a food processor if you’re short on time!
In a large mixing bowl, combine the chopped broccoli with breadcrumbs, cheddar, Parmesan, eggs, flour, garlic powder, and onion powder. Season with salt and pepper, and give everything a good stir until it’s well mixed.
Shape the mixture into small balls, about an inch in diameter, and place them on the prepared baking sheet.
Bake for 20-25 minutes, or until the cheese balls are golden and firm to the touch.
Let them cool for a few minutes before serving—trust me, they’re hot!