Preheat oven to 425°F. Lightly grease a large baking pan with non-stick cooking spray, or cover with parchment paper. Set aside.
In a medium bowl, stir together the bread crumbs, Parmesan cheese, garlic powder, onion powder, salt, and pepper. Set aside.
In a shallow baking dish or small bowl, add flour; in another dish or bowl, whisk eggs. Dredge beans in flour mixture, then dunk in egg mixture, and then coat in the bread crumb mixture.
Place beans in a single layer on prepared baking pan. Repeat with rest of beans until all are coated in bread crumb mixture.
Bake for 10-12 minutes, or until coating turns golden brown and starts to crisp. Remove from oven and let cool for 5 minutes. Serve with ranch dressing or ketchup, if desired.