Southern Sweet Onion Casserole

Indulge your taste buds in a Southern culinary journey with this delectable Southern Sweet Onion Casserole. Packed with the rich, sweet flavor of Vidalia onions, this casserole is a comforting side dish that perfectly complements any Southern feast. Whether served at a family gathering or a Sunday dinner, this dish brings the warmth and hospitality of the South to your table.


  • 4 large Vidalia onions, thinly sliced
  • 1/4 cup unsalted butter, melted
  • 1 cup mayonnaise
  • 1 cup shredded sharp cheddar cheese
  • 1 cup crushed buttery crackers (such as Ritz)
  • Salt and pepper to taste
  • Fresh parsley, chopped, for garnish (optional)


Step 1: Preheat the Oven

  1. Preheat your oven to 350°F (175°C).

Step 2: Prepare the Onions

  1. Peel and thinly slice the Vidalia onions.

Step 3: Assemble the Casserole

  1. In a large mixing bowl, combine the thinly sliced onions with the melted butter, mayonnaise, and shredded cheddar cheese. Mix until well combined.
  2. Season the mixture with salt and pepper to taste. Be cautious with the salt as the cheese and crackers may add some saltiness.

Step 4: Layer in a Baking Dish

  1. Grease a baking dish and transfer the onion mixture into the dish, spreading it evenly.
  2. Sprinkle the crushed buttery crackers over the top of the onion mixture, creating a flavorful and crispy crust.

Step 5: Bake to Golden Perfection

  1. Bake in the preheated oven for approximately 30-35 minutes or until the casserole is golden brown and bubbly.

Step 6: Garnish and Serve

  1. If desired, garnish the Southern Sweet Onion Casserole with chopped fresh parsley for a touch of freshness.
  2. Allow the casserole to cool for a few minutes before serving.


  • Vidalia onions are known for their natural sweetness, but you can substitute with other sweet onion varieties if needed.
  • Experiment with different types of cheese for varied flavor profiles. Smoked gouda or Monterey Jack can add a unique twist.
  • For added texture, consider mixing in some finely chopped pecans or crispy bacon bits.

This Southern Sweet Onion Casserole is a testament to the heartwarming flavors of Southern cuisine. The sweet onions, creamy mayonnaise, and cheesy goodness come together in a delightful harmony that’s sure to please any palate. Whether served alongside grilled meats or as a standout side at holiday gatherings, this casserole embodies the soulful taste of the South.

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