Preheat your oven to 350ºF. This step is crucial for ensuring your casserole cooks evenly. While waiting for the oven to reach temperature, take a moment to prepare your baking dish.
Lightly spray a 9×13-inch baking dish with cooking spray. This will prevent the casserole from sticking and make for easier cleanup.
In a large mixing bowl, combine the thawed green beans, cream of mushroom soup, sour cream, onion powder, garlic salt, and pepper. Use a spatula to mix the ingredients until well combined. It should be creamy and blended beautifully.
Add in the shredded cheddar cheese and fold it into the mixture carefully. You want to ensure the cheese is evenly distributed without over-mixing.
Spread the mixture evenly into the prepared baking pan. Make sure it’s level for even baking, which will help the casserole heat thoroughly.
Next, sprinkle the uncooked Stove Top stuffing mix on top of the casserole. This will create a delicious crunchy topping as it bakes.
Pour the chicken broth evenly over the stuffing mix. This step is essential as it helps the stuffing become moist and flavorful while baking.
Now, place the casserole in the preheated oven. Bake for 30 to 40 minutes, or until the topping is golden brown and the casserole is bubbly. Keep an eye on it near the end to prevent over-browning.
Once done, remove the casserole from the oven and let it sit for a few minutes before serving. This resting time allows it to set slightly, making it easier to scoop portions.
Serve the Yum Yum Green Bean Casserole warm, and enjoy the delicious flavors and textures!