Description
Tennessee Onions is a classic, old-fashioned onion casserole packed with sweet onions, a blend of aromatic herbs and spices, topped with melted Cheddar and smoked Gouda cheeses baked to golden perfection. This comforting side dish delivers a unique and flavorful addition to any meal.
Ingredients
Onions and Seasonings
- 2 1/2 lb. sweet onions (about 3 large onions), sliced crosswise into 1/4-in.-thick slices and separated into rings
- 1 tsp. dried thyme
- 1 tsp. dried parsley flakes
- 1 tsp. garlic salt
- 1/2 tsp. dried oregano
- 1/2 tsp. dry mustard
- 1/4 tsp. cayenne pepper
Other Ingredients
- Cooking spray
- 1/4 cup salted butter, cut into 1/4-in.-thick pieces
- 4 oz. mild Cheddar cheese, shredded (about 1 cup)
- 4 oz. smoked Gouda cheese, shredded (about 1 cup)
Instructions
- Warm the oven: Preheat your oven to 350°F (175°C). Lightly coat a 13- x 9-inch baking dish with cooking spray to prevent sticking.
- Season the onions: In a large bowl, place the sliced onion rings. Sprinkle the dried thyme, parsley flakes, garlic salt, dried oregano, dry mustard, and cayenne pepper over the onions. Toss gently to evenly coat all the onion rings with the seasoning mix.
- Add to baking dish: Arrange the seasoned onion rings evenly in the prepared baking dish, spreading them out to form a uniform layer.
- Add toppings and bake: Distribute the salted butter pieces evenly over the onions. Sprinkle the shredded mild Cheddar and smoked Gouda cheeses evenly on top. Cover the dish tightly with aluminum foil to keep moisture in and bake in the preheated oven until the onions are soft and the sides of the casserole are bubbly, about 40 minutes.
- Finish baking: Carefully remove the foil and continue baking uncovered at 350°F for about 30 minutes more, or until the top is beautifully golden and slightly crispy.
Notes
- Use sweet onions like Vidalia or Walla Walla for best flavor.
- Adjust cayenne pepper to taste if you prefer a milder or spicier dish.
- Covering with foil initially helps cook the onions thoroughly while keeping the casserole moist.
- Allow the casserole to rest for a few minutes after baking to let it set before serving.
- This dish pairs wonderfully with roasted meats or as part of a holiday dinner.
- Prep Time: 10 mins
- Cook Time: 1 hr 10 mins
- Category: Side Dish
- Method: Baking
- Cuisine: American Southern
