Hosting Thanksgiving or Friendsgiving? These caramelized onion and brie crostini are the perfect holiday appetizers. With sweet onions, creamy brie, and crisp toasted bread, they make an easy yet elegant finger food that can be prepped ahead of time. Perfect for busy hosts who still want to impress guests, these bite-sized delights bring cozy flavors to your holiday table without any stress.
Table of Contents
Table of Contents
5 Reasons Why You’ll Love It
- Sweet and savory flavor combo
- Perfect for Thanksgiving or Friendsgiving
- Can be prepped ahead of time
- Elegant but easy finger food
- Always a crowd-pleaser
Time Breakdown
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Servings: 12 pieces
Ingredients List
- 1 French baguette, sliced into 12 rounds
- 2 tablespoons olive oil
- 2 large yellow onions, thinly sliced
- 1 tablespoon unsalted butter
- 1 teaspoon balsamic vinegar
- 6 ounces brie cheese, cut into 12 small slices
- 1 teaspoon fresh thyme leaves (optional, for garnish)
- Pinch of salt and black pepper
Kitchen Tools You’ll Need
This recipe doesn’t require fancy gadgets, just a few reliable kitchen basics to keep everything simple and stress-free.
- Large skillet
- Baking sheet
- Sharp knife
- Cutting board
- Measuring spoons
- Wooden spoon or spatula
How to Make Step-by-Step
Step 1: Prep the bread
Brush each baguette slice lightly with olive oil. Place on a baking sheet and toast in the oven at 375°F for 6–8 minutes until golden and crisp.
Step 2: Caramelize onions
In a skillet over medium heat, melt butter and add onions. Cook for 20–25 minutes, stirring occasionally, until onions turn soft and golden brown. Stir in balsamic vinegar, salt, and pepper.
Step 3: Assemble crostini
Place one slice of brie on each toasted baguette. Top with a spoonful of caramelized onions.
Step 4: Warm and serve
Return assembled crostini to the oven for 3–4 minutes, just until brie softens slightly. Garnish with thyme and serve warm.
Caramelized Onion & Brie Crostini
Equipment
- Large Skillet
- Baking Sheet
- Sharp knife
- Cutting board
- Measuring spoons
- Wooden spoon or spatula
Ingredients
- 1 loaf French baguette sliced into 12 rounds
- 2 tbsp olive oil
- 2 large yellow onions thinly sliced
- 1 tbsp unsalted butter
- 1 tsp balsamic vinegar
- 6 oz brie cheese cut into 12 slices
- 1 tsp fresh thyme leaves optional, for garnish
- 1 pinch salt and pepper
Instructions
- Brush baguette slices with olive oil, place on baking sheet, and toast at 375°F for 6–8 minutes.
- Melt butter in skillet, add onions, and cook for 20–25 minutes until golden. Stir in balsamic, salt, and pepper.
- Top each baguette slice with brie and caramelized onions.
- Return to oven for 3–4 minutes until brie softens. Garnish with thyme and serve.
Notes
Nutrition
Variations to Try
- Swap brie for goat cheese or camembert for a different creamy flavor.
- Add a drizzle of honey for extra sweetness.
Storage Tips
Store leftover caramelized onions in an airtight container in the refrigerator for up to 3 days. Crostini are best assembled fresh, but you can toast bread and make onions in advance to save time. Reheat onions gently before serving.
Pro Tips
- Prepare onions the day before to cut down on prep time.
- For a nutty crunch, sprinkle toasted walnuts or pecans on top.
- Serve with sparkling wine or cider for a festive pairing.
- If brie is too soft to slice, chill it for 15 minutes before cutting.
Nutrition Facts
- Serving Size: 2 crostini
- Calories: 210
- Protein: 7g
- Carbohydrates: 20g
- Fat: 12g
- Fiber: 2g
- Sugar: 5g
Disclaimer: Nutrition facts are estimated using online tools and may vary based on your ingredients and preparation. Please consult a nutritionist for precise dietary advice.
FAQs
Can I make caramelized onions ahead of time?
Yes, they can be made 2–3 days in advance and stored in the fridge.
What type of bread works best?
A French baguette is ideal, but ciabatta also works well.
Can I serve these cold?
They taste best warm, but can be served at room temperature for parties.
Can I make this vegetarian-friendly?
Yes, the recipe is naturally vegetarian-friendly.
Closing Notes
Caramelized onion and brie crostini are the ultimate elegant yet easy appetizer for Thanksgiving, Friendsgiving, or any holiday party. With just a handful of simple ingredients, you can wow guests without spending hours in the kitchen. Make-ahead friendly and always delicious, these bites will quickly become a seasonal favorite.
