4.6 from 102 votes
Caramelized Onion and Mushroom Crostini
Caramelized Onion and Mushroom Crostini features thinly sliced onions and mixed mushrooms slowly cooked in butter and Marsala wine with fresh thyme until deeply caramelized and jammy. The mixture is spread on toasted, butter-brushed baguette slices, creating a savory appetizer with rich, sweet, and earthy flavors balanced by herbaceous notes.
Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins
Servings:
16
Calories:
91 kcal
Course:
Appetizer
Cuisine:
Italian
Ingredients
- 5 tablespoons unsalted butter divided, Vermont Creamery cultured
- 1 medium yellow onion , thinly sliced
- 8 ounces shiitake mushrooms cleaned, stemmed and sliced
- 8 ounces brown mushrooms cleaned, stemmed and sliced
- 1 clove garlic , pressed or minced
- ¼ cup marsala wine
- 2 teaspoons thyme fresh leaves
- ½ teaspoon kosher salt
- ¼ teaspoon black pepper freshly ground
- 1 loaf baguette
Instructions
- Melt 4 tablespoons of the butter in a large skillet over medium heat. Add the sliced onion and mushrooms and cook for 5 minutes, stirring occasionally, until the onions and mushrooms become tender and golden. Off heat, add the Marsala wine to the onions with the thyme leaves, place back on the burner and reduce the heat to a simmer. Cook for 5-7 minutes or until jammy.
- While the onion mixture cooks, place the sliced bread on a foil or parchment lined baking sheet. Melt the remaining 1 tablespoon of butter in a small saucepan over medium heat or in the microwave on high for 30 seconds. Brush the bread slices with melted butter and toast in the oven until lightly browned.
- To assemble, mound each of the toasts with equal amounts of the caramelized onion mushroom mixture. Sprinkle with more thyme leaves and serve.
Cup of Yum
Notes
- The caramelized onion and mushroom mixture can be prepared up to 3-4 days in advance and refrigerated.
- Reheat the mixture gently in a saucepan or microwave before topping the toasted baguette slices.
- Brush bread slices with melted butter before toasting to achieve a crisp and flavorful base.
Nutrition Information
Calories
91kcal
(5%)
Carbohydrates
11g
(4%)
Protein
2g
(4%)
Fat
4g
(6%)
Saturated Fat
2g
(10%)
Cholesterol
9mg
(3%)
Sodium
172mg
(7%)
Potassium
137mg
(3%)
Fiber
1g
(4%)
Sugar
1g
(2%)
Vitamin A
121IU
(2%)
Vitamin C
1mg
(1%)
Calcium
18mg
(2%)
Iron
1mg
(6%)
Nutrition Facts
Serving: 16 Serving
Amount Per Serving
Calories 91
% Daily Value*
| Calories | 91kcal | 5% |
| Carbohydrates | 11g | 4% |
| Protein | 2g | 4% |
| Fat | 4g | 6% |
| Saturated Fat | 2g | 10% |
| Cholesterol | 9mg | 3% |
| Sodium | 172mg | 7% |
| Potassium | 137mg | 3% |
| Fiber | 1g | 4% |
| Sugar | 1g | 2% |
| Vitamin A | 121IU | 2% |
| Vitamin C | 1mg | 1% |
| Calcium | 18mg | 2% |
| Iron | 1mg | 6% |
* Percent Daily Values are based on a 2,000 calorie diet.