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Sweet Onion Casserole

"This wonderful combination of sweet onions, Swiss cheese, and rice is a tasty side dish for anything from grilled meats to roasted poultry. It is a favorite in our home, and you'll get rave reviews every time you serve it."

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Why it works: Butter and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and 42,827 recipes mention both. Both carry guaiacol, which smells smoky, sweet. The science ↓

The recipe

1 2-quart dish
Prep15 min
Cook1 hr 15 min

Ingredients

Contains: milk (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.

  1. Preheat the oven to 350°F (177°C). Lightly grease a 2-quart baking dish with a little of the butter.

  2. Bring a pot of water to a boil, add the basmati rice, reduce to a simmer, cover, and cook about 18 minutes until just tender. Drain well.

  3. Melt the remaining butter in a large skillet over medium-low heat. Add the chopped sweet onions, cover, and cook about 15 minutes, stirring occasionally, until soft.

  4. Uncover the onions, raise the heat to medium, and cook about 5 minutes more, stirring, until golden. Remove from heat and stir in the salt and half-and-half cream.

  5. Stir the drained rice and 1 cup of the Swiss cheese into the onion mixture. Spread the mixture evenly in the prepared baking dish.

  6. Sprinkle the remaining 1 cup Swiss cheese over the top. Bake about 30 minutes, until bubbling and the cheese is golden.

  7. Let the casserole rest for 5 minutes before serving.

By allrecipes. Recipe from Open Recipes.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Butter + oniontop 7% of all pairs
    Aroma overlapmoderate
    Mentioned together42,827 recipes

    Shared aroma: guaiacol (smoky, sweet).

  2. Butter + swiss cheesetop 3% of all pairs
    Aroma overlapstrong
    Mentioned together412 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  3. Butter + creamtop 3% of all pairs
    Aroma overlapstrong
    Mentioned together41,494 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  4. Cream + swiss cheesetop 7% of all pairs
    Aroma overlapmoderate
    Mentioned together174 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  5. Onion + swiss cheesetop 8% of all pairs
    Aroma overlapmoderate
    Mentioned together436 recipes

    Shared aroma: ethyl butyrate (apple, fruity).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs