Go Back
+ servings
4.5 from 2 votes
Warm French Onion Dip in a cast iron gratin dish with parmesan crostini around.
Warm French Onion Dip 
Prep Time
15 mins
Cook Time
20 mins
Total Time
35 mins
Take the flavors of French onion chip dip and French onion soup and put them together in a hot dip straight out of the oven. The result is this Warm French Onion Dip which is delicious with Parmesan crostini or any number of sturdy crudités.
Course: Appetizers/Snacks
Cuisine: French
Keyword: Vegetarian, Make Ahead
Servings: 8
Calories: 426 kcal
  • 2 tablespoons unsalted butter
  • 2 Vidalia onions chopped
  • ¼ cup dry sherry
  • 1 teaspoon Worcestershire sauce
  • 1 teaspoon chopped fresh thyme leaves
  • salt and freshly ground black pepper
  • 8 ounces cream cheese softened
  • ½  cup sour cream
  • 3 tablespoons grated Parmesan cheese
  • 2 cups grated Gruyère cheese divided
  • chopped fresh chives for garnish
Crostini for Serving:
  • 1 baguette loaf
  • olive oil
  • ¼ cup grated Parmesan cheese
  1. Melt the butter in a 12-inch skillet over medium heat. Add the onions and toss them in the butter. Cut a piece of parchment paper the same size of the inside of the skillet. Place the parchment paper on top of the onions as they cook. Cook over low heat for about 25 to 30 minutes, stirring occasionally to pick up any brown bits on the bottom of the pan.

  2. Pre-heat oven to 375ºF.

  3. When the onions have softened and browned, add the sherry, Worcestershire sauce and thyme leaves, tossing well to combine. Season with salt and freshly ground black pepper and simmer for a few more minutes.

  4. Remove the skillet from the heat. In a large bowl combine the softened cream cheese, sour cream, Parmesan cheese and ½ cup of the Gruyère cheese. Fold the caramelized onions into the mixture. Spread the mixture into a 2-quart casserole dish. Top with the remaining Gruyère cheese and bake in the 375ºF oven for 15 minutes.

  5. Switch the oven setting to broil and leave the casserole under the broiler for 2 to 5 minutes, until the top has browned and is bubbly.

  6. Garnish with the chopped chives and serve the hot dip with crostini.

To make Crostini :
  1. Pre-heat the oven to 375ºF.

  2. Slice the baguette into ¼-inch slices. Place the slices on a baking sheet, brush with olive oil and season with freshly ground black pepper. Sprinkle the grated Parmesan cheese on top.

  3. Bake at 375°F for 10 to 12 minutes, until lightly brown.

Nutrition Facts
Warm French Onion Dip 
Amount Per Serving
Calories 426 Calories from Fat 261
% Daily Value*
Fat 29g45%
Saturated Fat 16g80%
Cholesterol 87mg29%
Sodium 496mg21%
Potassium 230mg7%
Carbohydrates 24g8%
Fiber 2g8%
Sugar 6g7%
Protein 17g34%
Vitamin A 925IU19%
Vitamin C 4.5mg5%
Calcium 474mg47%
Iron 1.4mg8%
* Percent Daily Values are based on a 2000 calorie diet.