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Cheesy Kohlrabi Gratin is a comforting, low-carb twist on the classic potato gratin. Swapping starchy potatoes with tender slices of kohlrabi keeps this dish lighter while maintaining all the creamy, cheesy indulgence you crave. Kohlrabi’s mild, slightly sweet flavor pairs beautifully with rich cream and nutty Gruyère or cheddar cheese. This bake is perfect as a hearty vegetarian main or as a flavorful side dish for roasted meats or holiday meals.

FULL RECIPE

Ingredients

2 medium kohlrabi bulbs, peeled and thinly sliced (about 1/8 inch thick)
1 tablespoon butter (for greasing the dish)
1 tablespoon olive oil
1 medium onion, thinly sliced
2 cloves garlic, minced
1 teaspoon salt
1/2 teaspoon black pepper
1/4 teaspoon ground nutmeg (optional, for added depth)
1 cup heavy cream
1/2 cup whole milk
1 cup shredded Gruyère cheese (or substitute with sharp white cheddar)
1/2 cup grated Parmesan cheese
1/4 cup chopped fresh parsley or chives (optional, for garnish)

Directions

Preheat your oven to 375°F (190°C). Lightly butter a medium-sized baking dish (about 8×8 inches).
In a skillet over medium heat, warm the olive oil and sauté the sliced onions until soft and golden, about 6–8 minutes. Add the garlic and cook for another minute until fragrant.
In a saucepan, combine the cream, milk, salt, pepper, and nutmeg. Warm the mixture over medium heat until it just starts to simmer. Remove from heat.
Spread half of the sliced kohlrabi in the prepared dish. Top with half of the sautéed onions and garlic, followed by a third of the Gruyère and a sprinkle of Parmesan.
Repeat the layers: the remaining kohlrabi, onions, and another third of Gruyère. Pour the cream mixture evenly over the entire dish.
Top with the remaining Gruyère and all the remaining Parmesan cheese.
Cover with foil and bake for 30 minutes. Remove foil and bake uncovered for another 20–25 minutes, or until the kohlrabi is tender and the top is golden brown and bubbly.
Let it cool for 10 minutes before garnishing with chopped parsley or chives. Serve warm.

Nutrition Facts

Calories: 280
Total Fat: 23g
Saturated Fat: 13g
Cholesterol: 75mg
Sodium: 450mg
Total Carbohydrates: 10g
Dietary Fiber: 3g
Sugars: 4g
Protein: 10g
Vitamin A: 900 IU
Vitamin C: 45mg
Calcium: 250mg
Iron: 1mg

The Appeal of Kohlrabi in Gratin Dishes

Kohlrabi, a lesser-known but highly versatile cruciferous vegetable, is an excellent base for gratin recipes due to its mild flavor and slightly crisp texture when cooked. Unlike potatoes, kohlrabi contains fewer carbohydrates and calories, making it a popular option for those following keto or low-carb diets. In a cheesy gratin, it absorbs the cream and cheese beautifully while still retaining a pleasant bite. Its subtle sweetness enhances the richness of the dairy elements, creating a dish that feels indulgent without being overly heavy.

Low-Carb Comfort Without Compromise

One of the main reasons people love Cheesy Kohlrabi Gratin is that it delivers all the comfort of a traditional potato gratin without the carbohydrate overload. This makes it particularly appealing to individuals managing their blood sugar levels or reducing their carb intake. Unlike typical gratins that rely heavily on starchy vegetables, kohlrabi allows diners to enjoy creamy textures and cheesy flavors without the accompanying guilt, helping maintain diet goals while still savoring comfort food classics.

Cheese Selection for Maximum Flavor

Cheese plays a central role in this gratin, so choosing the right varieties can make a significant difference. Gruyère is often the first choice due to its excellent melting properties and nutty, slightly sweet flavor. However, other options such as sharp white cheddar, fontina, or even gouda can be used to customize the flavor profile. A small amount of Parmesan adds a salty, umami-rich finish that enhances depth. Mixing cheeses offers complexity and richness, which complements the mild character of the kohlrabi beautifully.

Cream Sauce: The Silky Binder

The cream sauce used in this gratin isn’t just for moisture—it’s the rich binder that brings the entire dish together. A mixture of heavy cream and whole milk achieves the ideal balance of thickness and flavor without being overly greasy. Infusing the sauce with garlic, onions, and optional nutmeg adds aromatic layers that work harmoniously with the cheese. As it bakes, the cream thickens and envelops the kohlrabi slices, transforming them into tender, savory bites that feel luxurious and satisfying.

Health Benefits of Kohlrabi

Beyond its culinary versatility, kohlrabi offers a number of health benefits. It’s an excellent source of dietary fiber, which supports digestion and helps regulate blood sugar levels. Rich in vitamin C and other antioxidants, it supports immune function and cellular health. Additionally, kohlrabi contains phytonutrients that are associated with reducing inflammation and possibly lowering the risk of chronic diseases. Its low calorie content makes it an ideal choice for weight-conscious eaters who still want a filling meal.

Variations to Explore

There are several ways to adapt Cheesy Kohlrabi Gratin to suit different preferences or to experiment with seasonal ingredients. For a more decadent twist, bacon crumbles or pancetta can be added between the layers. Vegetarians might enjoy adding sautéed mushrooms or thinly sliced leeks for an earthier flavor. To boost nutrition, layers of spinach or kale can be incorporated. For a dairy-free version, plant-based creams and cheeses can be substituted with excellent results if done carefully to maintain flavor and texture.

Serving Suggestions and Meal Pairings

Cheesy Kohlrabi Gratin is versatile enough to serve as either a main course or a side dish. When served as a main, it pairs beautifully with a simple green salad dressed in a light vinaigrette to contrast the richness of the gratin. As a side dish, it complements roasted chicken, pork chops, or grilled steak particularly well. It’s also a perfect addition to holiday menus, where it can offer a lighter, more unique alternative to traditional potato-based casseroles.

Make-Ahead and Reheating Tips

One of the conveniences of this dish is that it can be prepared in advance and stored until ready to bake. Simply assemble the gratin, cover tightly, and refrigerate for up to 24 hours before baking. If baking from chilled, you may need to increase the cooking time by 10 to 15 minutes. Leftovers can be stored in an airtight container for up to 4 days. To reheat, use an oven or toaster oven for the best texture—microwaving may cause the cheese to separate or the dish to become watery.

Presentation and Garnishing Ideas

Although it’s a rustic dish at heart, Cheesy Kohlrabi Gratin can be plated beautifully for special occasions. A sprinkling of chopped fresh herbs like parsley, thyme, or chives right before serving adds a burst of color and freshness that cuts through the richness. For a golden, appetizing crust, you can broil the gratin for the last few minutes of baking. Serving the gratin in individual ramekins or a cast iron skillet adds charm and visual appeal, especially for dinner parties or intimate meals.

Dietary Adaptations and Allergen Awareness

This recipe is naturally gluten-free, making it suitable for individuals with gluten sensitivities or celiac disease. For those who are lactose-intolerant or allergic to dairy, plant-based cream alternatives such as cashew cream or coconut milk, and dairy-free cheeses can be used with a few adjustments to flavor. It’s important to read labels carefully when making substitutions, as some non-dairy cheeses may not melt as effectively or could contain additives that affect texture.

Conclusion

Cheesy Kohlrabi Gratin is more than just a comfort food makeover—it’s a delicious, low-carb celebration of seasonal vegetables, rich dairy, and satisfying textures. With its ease of preparation, adaptability, and nutritional benefits, it’s a dish that deserves a regular spot in your meal rotation. Whether you’re looking for a cozy weeknight dinner, a holiday side, or a new way to enjoy kohlrabi, this gratin delivers in taste, presentation, and comfort.

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