Caramelized Onion and Green Bean Gratin
Caramelized Onion and Green Bean Gratin pairs tender-crisp beans with deeply sweet onions and a creamy, gently spiced sauce. A Gruyère-Parmesan topping and buttery panko bake into a golden crust that adds satisfying crunch and nutty richness. Serve it alongside roast meats or as a standout holiday side when you want comfort and elegance in one dish.
- Prep45 mins
- Cook45 mins
- Serves10
- DifficultyMedium
easyChef Pro health score
Calculated from USDA-referenced nutrient data for the ingredients in Caramelized Onion and Green Bean Gratin, not estimated by an AI model. The same recipe returns the same score every time.
- Glycemic ImpactFair
- 48 / 100
- Carb quality, not quantity. Higher is better.
- Nutritional DensityPoor
- 3 / 100
- Nutrients per calorie. Higher is better.
- Energy DensityGood
- 92 / 100
- Calories by weight. Higher means more food for fewer calories.
- NOVA Processed Culinary Ingredients
- 2 / 4
- Processing level, 1 (whole) to 4 (ultra-processed). Lower is better.
How it scores for each health goal
The same recipe scores differently against different goals, because the goal changes the calculation rather than filtering a list. Set your goal in easyChef Pro and every recipe is scored against it.
- 44
- Heart Health
- 71
- Metabolic
- 29
- Digestive
- 21
- Inflammatory
- 40
- Performance
- 43
- General Wellness
- 1
Gather the ingredients.
- 2
Preheat the oven to 375 degrees F (190 degrees C).
- 3
Grease a 9x13-inch casserole dish.
- 4
Heat 2 tablespoons of butter in a large skillet over medium heat.
- 5
Add the onions to the pan; cook and stir until very soft and golden brown, about 15 minutes.
- 6
Stir in the sherry vinegar, then transfer the mixture to a small bowl and set aside.
- 7
In the same skillet, melt 2 more tablespoons of butter.
- 8
Whisk in 2 tablespoons of flour.
- 9
Cook over medium heat, stirring constantly, until the flour smells like baked pie crust, about 3 minutes.
- 10
Slowly whisk in the milk, about 1/2 cup at a time, then whisk in the nutmeg, cayenne pepper, and thyme.
- 11
Bring to a simmer and cook, whisking constantly, until thickened, 3 more minutes.
- 12
Transfer to a bowl and set aside.
- 13
Melt the remaining 2 tablespoons of butter in a clean skillet; stir in the panko until all the crumbs are coated; set aside.
- 14
Bring a large saucepan of salted water to a boil over medium heat, and boil the beans until bright green and crisp but not raw tasting, 3 to 4 minutes.
- 15
Drain very well.
- 16
Spoon half of the caramelized onions into the prepared casserole dish; top with the green beans.
- 17
Season with salt and black pepper.
- 18
Spread the reserved white sauce over the green beans; sprinkle with half of the Gruyere cheese.
- 19
Top with the rest of the onions, and use the back of a spoon to press the onions down into the sauce and cheese.
- 20
Top with the buttered panko crumbs, the remaining Gruyere, and the Parmesan cheese.
- 21
Bake in the preheated oven until hot throughout and lightly browned, about 30 minutes.
- 22
Let sit for 10 minutes before serving.
- 23
Serve and enjoy.
- Calories 201.03 kcal Moderate 10%
- Protein 9.67 g Moderate 19%
- Carbohydrate 22.61 g 8%
- Total Fat 8.1 g Moderate 10%
- Saturated Fat 4.44 g High 22%
- Trans Fat 0.0 g Low Source 0%
- Cholesterol 21.12 mg Moderate 7%
- Sodium 161.18 mg Moderate 7%
- Dietary Fiber 3.58 g Moderate 13%
- Total Sugars 6.93 g --
- Added Sugars 0.0 g Low Source 0%
- Calcium 272.46 mg Good Source 21%
- Iron 0.94 mg Low Source 5%
- Potassium 403.11 mg Low Source 9%
- Vitamin A 70.82 mcg Low Source 8%
- Vitamin C 11.08 mg Moderate 12%
- Vitamin D 0.8 mcg Low Source 4%
Values are per serving. Percent Daily Values are based on a 2,000-calorie diet.
- Milk 🥛
- Wheat 🌾
- Gluten
- Onions 🧅
- Alcohol 🚫🍷
About This Recipe
Caramelized Onion and Green Bean Gratin is a French side dish recipe made with 13 ingredients. It takes about 1 hr 30 mins, serves 10, and is rated medium. Key ingredients include All Purpose Flour, Butter, Cayenne Pepper, and Grated Parmesan Cheese. Each serving provides about 201.03 kcal.
Recipe Questions
- What is Caramelized Onion and Green Bean Gratin?
- It is a French gratin recipe made with 13 ingredients, usually served for side dish.
- What is Caramelized Onion and Green Bean Gratin made of?
- The main ingredients are All-Purpose Flour, Butter, Cayenne Pepper, Grated Parmesan Cheese, Green Beans. The full list of 13 is above.
- How long does it take to make Caramelized Onion and Green Bean Gratin?
- About 1 hr 30 mins in total: 45 mins to prepare and 45 mins to cook.
- How many calories are in one serving?
- One serving provides about 201.03 kcal. The full nutrition breakdown is above.
- Is Caramelized Onion and Green Bean Gratin easy to make?
- This recipe is rated medium, with 13 ingredients and 23 steps.
- Is Caramelized Onion and Green Bean Gratin healthy?
- Caramelized Onion and Green Bean Gratin has an easyChef Pro health score of 44/100. Per serving, it provides 201.03 calories and 9.67 g of protein, or 19% of the Daily Value. It is a good source of calcium. Worth noting per serving: sodium at 161.18 mg (7% of the Daily Value) and saturated fat at 4.44 g (22% of the Daily Value). It contains Milk, Wheat, Gluten, Onions and Alcohol, so it may not be suitable for people with those allergies or dietary restrictions. Whether it fits your goals depends on your complete meal plan and nutritional needs. Remix it in easyChef Pro to adjust the ingredients and generate fresh nutrition and scores.
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