Creamy Fennel Gratin with Pancetta
This Creamy Fennel Gratin with Pancetta is rich, savory, and surprisingly simple to make! Tender fennel and onions bake in a creamy gorgonzola sauce with crispy pancetta and Parmesan on top. It’s a great alternative when you want something other than the usual potato gratin.
If you know me, you know I’m a gratin person. There’s just something irresistible about vegetables baked in a creamy sauce with a golden, bubbly top. It’s comfort food, but it also feels just a little bit elegant.
Of course, I’ll never say no to a classic potato gratin, but the beauty of a gratin is that you can transform almost anything into one. Fennel is especially perfect here! Its natural sweetness softens as it cooks and pairs beautifully with salty pancetta and creamy gorgonzola. It has the perfect combination of textures and flavors that I just know you’re going to love!
Why You’ll Love This Creamy Fennel Gratin Recipe
- It’s a unique twist on a classic gratin. Most gratins rely on potatoes, but this fennel gratin has a delicate sweetness and subtle anise flavor that makes this dish feel fresh and interesting.
- Rich, creamy, and full of flavor. Between the gorgonzola cream sauce, salty pancetta, and nutty Parmesan topping, every bite is layered with savory goodness.
- A great make-ahead side dish. This creamy fennel gratin reheats beautifully, making it perfect for dinner parties, holidays, or any meal where you want to prep ahead.
- Surprisingly simple to make. Despite its elegant flavor, this recipe uses just a handful of ingredients and comes together in about 45 minutes. Don’t worry, the oven does most of the work!
- Perfect for fall and winter meals. Warm, cheesy baked dishes like this are ideal for cozy dinners when you want something comforting on the table.
Ingredients You Need
- Pancetta (or bacon): Adds savory depth and a little smoky saltiness. Pancetta is traditional, but bacon works perfectly too.
- Fennel bulbs: When cooked, fennel becomes tender and slightly sweet, mellowing its licorice-like flavor. I used 4 medium-sized fennel bulbs, but you can use about 3 large fennel bulbs if you need to.
- Yellow onion: Adds sweetness and extra caramelized flavor as it cooks with the fennel.
- Heavy cream: Creates the rich base for the cheese sauce.
- Gorgonzola cheese: Brings bold, tangy flavor that melts into the cream to form a luxurious sauce.
- Parmesan cheese: Sprinkled on top for a salty, golden crust as the gratin bakes.
- Salt and black pepper: Season to taste.
- Chopped chives (optional): Garnish the final gratin with chopped chives or another fresh herb like parsley!
Substitutions & Variations
- Use bacon instead of pancetta. Bacon adds a slightly smokier flavor and works just as well in this dish, if that is what you have on hand!
- Swap the gorgonzola. If you prefer a milder flavor, try fontina, gruyère, or even cream cheese for a softer cheese profile.
- Add breadcrumbs for extra crunch. A light sprinkle of buttered breadcrumbs on top can create a crisp, golden crust.
- Make it vegetarian. Simply skip the pancetta and sauté the fennel and onions in olive oil or butter.
How to Make Creamy Fennel Gratin with Pancetta
- Cook the Pancetta: Place pancetta in a cold skillet and cook over medium heat until crisp and the fat has rendered. Remove the pancetta and discard most of the excess fat, leaving a small amount in the pan.
- Sauté the Onion & Fennel: Add the sliced onion and fennel to the skillet. Cook on low heat for about 15 minutes, stirring occasionally, until softened and lightly caramelized. Season with salt and black pepper.
- Preheat Oven: Preheat the oven to 350°F.
- Make the Sauce: In a small saucepan, heat the heavy cream over medium heat. Add the gorgonzola and stir until melted and the sauce thickens slightly.
- Transfer to Baking Dish: Transfer the fennel mixture to a baking dish. Pour the gorgonzola cream sauce evenly over the top. Sprinkle with Parmesan cheese.
- Bake & Enjoy: Bake at 350°F for 20–25 minutes, or until bubbly and golden brown. Sprinkle with chopped chives if desired and serve warm.
Tips for Success
- Slice the fennel thinly! Thin slices cook more evenly and become tender in the gratin. If the slices are too thick, they may stay slightly crunchy.
- Cook the vegetables slowly. Low heat when you are cooking on the stove allows the fennel and onions to soften and develop sweetness without burning.
- Don’t overheat the cheese sauce. Gorgonzola melts best over gentle heat. High heat can cause the sauce to separate or become grainy. Mix everything together over low heat while the cheese melts.
- Let the gratin rest before serving. Allowing it to sit for 5 to 10 minutes after baking helps the sauce thicken slightly and makes serving easier.
How to Serve Fennel Gratin
This creamy fennel gratin makes a fantastic side dish for your favorite main dishes. I love it with my one pan pork tenderloin or my easy coq au vin. You can also serve it on holidays with maple roasted turkey breast or rosemary garlic roasted lamb! For a balanced meal, serve it alongside a crisp green salad or roasted vegetables!
Storage Suggestions
Store leftover fennel gratin in an airtight container in the refrigerator for up to 3 days. Reheat portions in the microwave or warm the dish in a 325°F oven until heated through.
To freeze, allow the gratin to cool completely, then wrap it tightly and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.
If making ahead, you can assemble the gratin up to a day in advance and store it covered in the refrigerator before baking.
Frequently Asked Questions
Raw fennel has a noticeable anise flavor, but it becomes much milder when cooked. In this gratin, the fennel turns sweet and tender, blending beautifully with the creamy cheese sauce.
Start by trimming the stalks and removing the tough base, then slice the fennel bulb in half and cut it into thin slices. Thin slices ensure the fennel becomes tender during cooking. Fennel wedges would be a bit too thick here, so make sure to slice them into slices.
More Gratin Recipes to Try
- Ham and Asparagus Gratin
- Beef & Cabbage Gratin
- Bacon & White Cabbage Gratin
- Two Potato Gratin with Maille Mustard
Creamy Fennel Gratin Recipe
Ingredients
- 4 oz pancetta or bacon, diced
- 4 medium fennel bulbs sliced
- 1 large yellow onion thinly sliced
- 1 cup heavy cream
- 6 oz gorgonzola cheese
- ⅓ cup Parmesan cheese grated
- Salt and black pepper to taste
- Chopped chives for serving (optional)
Instructions
- Place pancetta in a cold skillet and cook over medium heat until crisp and the fat has rendered. Remove the pancetta and discard most of the excess fat, leaving a small amount in the pan.
- Add the sliced onion and fennel to the skillet. Cook on low heat for about 15 minutes, stirring occasionally, until softened and lightly caramelized. Season with salt and black pepper.
- Preheat the oven to 350°F.
- In a small saucepan, heat the heavy cream over medium heat. Add the gorgonzola and stir until melted and the sauce thickens slightly.
- Transfer the fennel and onion mixture to a baking dish. Pour the gorgonzola cream sauce evenly over the top. Sprinkle with Parmesan cheese.
- Bake at 350°F for 20–25 minutes, or until bubbly and golden brown.
- Sprinkle with chopped chives if desired and serve warm.
Video
Notes
- Slice the fennel thinly! Thin slices cook more evenly and become tender in the gratin. If the slices are too thick, they may stay slightly crunchy.
- Cook the vegetables slowly. Low heat when you are cooking on the stove allows the fennel and onions to soften and develop sweetness without burning.
- Don’t overheat the cheese sauce. Gorgonzola melts best over gentle heat. High heat can cause the sauce to separate or become grainy. Mix everything together over low heat while the cheese melts.
- Let the gratin rest before serving. Allowing it to sit for 5 to 10 minutes after baking helps the sauce thicken slightly and makes serving easier.
