Preheat your oven to 350°F (175°C).
Blanch the green beans in boiling salted water for 3-4 minutes, then drain and set aside.
In a bowl, mix the cream of mushroom soup, milk, garlic powder, onion powder, salt, and pepper.
Stir in half of the cheddar cheese into the soup mixture.
Combine the green beans with the soup mixture in a large mixing bowl.
Transfer the mixture to a greased 2-quart baking dish.
Top with the remaining cheddar cheese and half of the crispy fried onions.
Bake in the preheated oven for 25 minutes.
Remove from the oven and sprinkle the remaining crispy fried onions on top.
Return to the oven and bake for an additional 5 minutes, until golden brown.