Caramelised Onion Sauce

Indulge in the rich, savory charm of this Caramelized Onion Sauce, a decadent blend of golden-brown onions, a touch of balsamic tang, and velvety butter for a sauce that elevates any meal. Perfected with the sweetness of granulated sugar and a gentle simmer in chicken or vegetable broth, this recipe achieves a lusciously smooth consistency, while the addition of a flour roux ensures a thick, silky finish. Ideal for draping over grilled meats, creamy mashed potatoes, or fresh pasta, this sauce brings a depth of flavor that transforms simple dishes into gourmet creations. With just 10 minutes of prep and a patient 45-minute cook time, you'll be rewarded with a versatile, flavor-packed condiment that's perfect for entertaining or enhancing weeknight meals. Keywords: caramelized onion sauce, savory sauce, balsamic onion gravy, gourmet sauce recipe, versatile condiment.

Nutriscore Rating: 69/100

Prep Time:10 mins

Cook Time:45 mins

Total Time:55 mins

Servings: 4

Ingredients

• 4 large Yellow onions
• 3 tablespoons Unsalted butter
• 1 tablespoon Olive oil
• 1 teaspoon Kosher salt
• 1 teaspoon Granulated sugar
• 2 tablespoons Balsamic vinegar
• 1 cup Chicken or vegetable broth
• 1 tablespoon All-purpose flour
• 0.5 teaspoon Black pepper

Directions

Step 1

Peel and thinly slice the onions into even half-moon slices.

Step 2

Heat a large skillet or sauté pan over medium heat and add the unsalted butter and olive oil. Allow them to melt and combine.

Step 3

Add the sliced onions to the pan, stirring well to coat them in the butter and oil mixture.

Step 4

Sprinkle the onions with kosher salt and granulated sugar. The salt will help the onions release their moisture, and the sugar will enhance the caramelization.

Step 5

Cook the onions on medium-low heat, stirring occasionally, for about 30 minutes or until they develop a deep golden brown color. Patience is key to achieving a rich caramelisation.

Step 6

Add the balsamic vinegar to the pan and stir to deglaze, scraping up any browned bits (fond) from the bottom of the pan.

Step 7

Sprinkle the all-purpose flour over the caramelised onions and stir well to coat. Cook for 1–2 minutes to remove the raw flour taste.

Step 8

Gradually pour in the chicken or vegetable broth, stirring constantly to create a smooth sauce. Bring the mixture to a gentle simmer.

Step 9

Allow the sauce to cook for 5–7 minutes, stirring occasionally, until it thickens to your desired consistency.

Step 10

Season with freshly ground black pepper and taste for additional seasoning, adjusting with more salt if needed.

Step 11

Remove the sauce from the heat and serve warm over your favorite dishes, such as grilled meats, mashed potatoes, or pasta.

Nutrition Facts

Serving size	(942.4g)

Amount per serving	% Daily Value*
Calories	761.2

Total Fat 51.2g	0%
Saturated Fat 23.5g	0%
Polyunsaturated Fat 1.3g
Cholesterol 93mg	0%
Sodium 1486.7mg	0%
Total Carbohydrate 73.9g	0%
Dietary Fiber 10.9g	0%
Total Sugars 35.2g
Protein 9.4g	0%

Vitamin D 0IU	0%
Calcium 164.6mg	0%
Iron 2.3mg	0%
Potassium 1021.8mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 58.0%

Protein: 4.7%

Carbs: 37.2%