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### How to Make It
1. **Preheat oven** to 350°F (175°C). Grease a 9×9-inch or similar baking dish.
2. **Cook the onions:** In a large skillet, melt butter over medium heat. Add sliced onions and cook slowly, stirring often, until soft and translucent—about 15–20 minutes. Don’t rush this step; it’s key to drawing out their natural sweetness.
3. **Mix the filling:** In a large bowl, combine the cooked onions, sour cream, mayonnaise, cheese, garlic powder, salt, and pepper. Stir until fully mixed.
4. **Assemble the casserole:** Pour the onion mixture into the prepared dish and spread evenly.
5. **Top it off:** Mix crushed crackers with melted butter and sprinkle over the top of the casserole.
6. **Bake:** Bake uncovered for 25–30 minutes, or until the top is golden brown and bubbly.
7. **Serve hot:** Let rest for 5–10 minutes before serving. Enjoy as a side or even a light main with salad and bread.
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### Tips & Variations
* **Add a little spice:** Mix in chopped jalapeños or a dash of cayenne pepper for a kick.
* **Make it heartier:** Add chopped cooked bacon or sautéed mushrooms to the filling.
* **No sour cream?** Substitute with plain Greek yogurt.
* **Make ahead:** Assemble the day before, refrigerate, and bake just before serving.
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### Perfect Pairings
* Grilled or roasted chicken
* Pulled pork or BBQ ribs
* Meatloaf
* Thanksgiving or holiday meals
* A simple green salad for a lighter plate
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### Final Thoughts
**Sweet Onion Casserole** is the kind of dish that surprises and delights. It’s rich without being heavy, sweet without being sugary, and totally comforting. With just a handful of ingredients, it elevates any meal and often earns a permanent spot on the dinner rotation.
Whether you’re serving it at a holiday table or a casual dinner with family, one thing’s certain: everyone will be asking for the recipe.
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Would you like a printable recipe card or an alternative gluten-free topping? Let me know — I’d love to help!
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