Southern Sweet Onion

Southern Sweet Onion Casserole: A Symphony of Sweetness and Comfort

Indulge in the warmth and comfort of Southern cuisine with our delightful Southern Sweet Onion Casserole. This classic dish embodies the heart and soul of Southern cooking, bringing together the sweetness of caramelized onions, the creaminess of cheese, and the satisfying crunch of buttery crackers. As you embark on this culinary journey, prepare to be enveloped in the rich flavors and aromas that define the soul-soothing essence of Southern comfort food.


For the Casserole:

  • 6 large sweet onions, thinly sliced
  • 1/2 cup (1 stick) unsalted butter
  • 1 cup mayonnaise
  • 1 cup sour cream
  • 2 cups shredded sharp cheddar cheese
  • 1 1/2 cups crushed buttery crackers (such as Ritz)
  • Salt and black pepper to taste
  • Chopped fresh chives for garnish (optional)


Prepare the Casserole:

  1. Caramelize the Onions:
    • In a large skillet, melt the butter over medium heat. Add the sliced onions and cook, stirring occasionally, until the onions are soft and golden brown, about 25-30 minutes.
  2. Preheat the Oven:
    • Preheat your oven to 350°F (175°C).
  3. Assemble the Layers:
    • In a greased baking dish, layer half of the caramelized onions. Top with half of the shredded cheddar cheese and half of the crushed buttery crackers. Repeat the layers.
  4. Mix the Creamy Mixture:
    • In a bowl, combine mayonnaise, sour cream, salt, and black pepper. Mix until well blended.
  5. Pour the Creamy Mixture:
    • Pour the mayonnaise and sour cream mixture over the layered onions, cheese, and crackers, ensuring it evenly covers the casserole.
  6. Finish with Toppings:
    • Sprinkle the remaining shredded cheddar cheese and crushed crackers on top.
  7. Bake to Perfection:
    • Bake in the preheated oven for 25-30 minutes or until the casserole is hot and bubbly, and the top is golden brown.
  8. Garnish and Serve:
    • Garnish with chopped fresh chives if desired. Allow the casserole to cool for a few minutes before serving.

Cook Notes

  • Perfectly Caramelized Onions:
    • Take your time caramelizing the onions to achieve that sweet and rich flavor. Low and slow is the key.
  • Cracker Crunch Consistency:
    • Crush the crackers to a consistency that provides a satisfying crunch without becoming too fine.
  • Make-Ahead Convenience:
    • You can prepare the caramelized onions and the layers in advance, assembling the casserole right before baking for a time-saving option.
  • Cheese Variations:
    • Experiment with different cheeses like Gruyère or Monterey Jack to add unique flavors to the casserole.


Bacon Bliss:

  • Add crispy bacon bits between the layers for a smoky and savory twist.

Herb-Infused Layers:

  • Introduce fresh herbs like thyme or rosemary to the caramelized onions for an aromatic enhancement.

Spicy Southern Kick:

  • Mix in a pinch of cayenne pepper or diced jalapeños for a Southern casserole with a spicy kick.

Keto Versions

Almond Flour Magic:

  • Substitute crushed almond flour crackers for a keto-friendly alternative.

Creamy Keto Blend:

  • Use a blend of cream cheese, heavy cream, and shredded keto-friendly cheese for the creamy mixture.

Cauliflower Crunch:

  • Replace the buttery crackers with crushed pork rinds or a cauliflower crumble for a low-carb crunch.

Low-Carb Versions

Nutty Delight:

  • Incorporate crushed nuts like pecans or almonds for a low-carb and crunchy topping.

Zucchini Zest:

  • Add thin slices of zucchini between the layers for a vegetable-rich, low-carb variation.

Cottage Cheese Creaminess:

  • Use cottage cheese in place of mayonnaise for a lower-carb creamy mixture.

A Nod to Southern Heritage

In conclusion, the Southern Sweet Onion Casserole isn’t just a dish; it’s a nostalgic journey to the heart of Southern heritage—a tribute to the comforting flavors that define Southern kitchens. Whether you follow the traditional recipe, explore variations, dive into keto adaptations, or opt for a low-carb twist, this casserole promises to be a celebration of sweetness and comfort.

As you savor each spoonful, let the sweetness of caramelized onions, the creaminess of the mayonnaise and sour cream mixture, and the satisfying crunch of buttery crackers envelop you in the embrace of Southern hospitality. The Southern Sweet Onion Casserole isn’t just a dish; it’s a reminder of the simple joys found in sharing a comforting meal with loved ones. So, preheat that oven, gather your ingredients, and revel in the delicious symphony of Southern flavors that will undoubtedly become a cherished part of your culinary repertoire. Here’s to the warmth of Southern kitchens and the timeless appeal of Southern comfort food!

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