Potato and cauliflower gratin

Potato and cauliflower gratin blends tender potatoes and cauliflower with creamy heavy cream and mozzarella cheese, enhanced by a touch of mustard for tang. This comforting dish can serve as a delightful side or a satisfying main course.

31 Dec 2025
Cook time 90 min
Prep time 10 min

Ingredients:

6 potatoes
1/2 cauliflower
1 cup heavy whipping cream
2 tsp mustard
1/2 cup mozzarella cheese

Potato and cauliflower gratin is a delightful dish that combines the earthy flavors of potatoes and cauliflower with the creamy richness of heavy whipping cream and the cheesy goodness of mozzarella. This gratin is perfect as a comforting side dish or even as a main course. The addition of mustard adds a subtle tang that complements the other ingredients beautifully. Follow these steps to create a delicious gratin that your family and friends will love.

Instructions:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).

2. Prepare the Vegetables:
- Peel the potatoes and slice them thinly (about 1/8 inch thick) using a sharp knife or mandolin.
- Cut the cauliflower into small florets.

3. Blanch the Vegetables:
- Bring a large pot of salted water to a boil.
- Add the potato slices and cauliflower florets to the boiling water and cook for about 5 minutes, until slightly tender.
- Drain the vegetables well and set aside.

4. Prepare the Cream Mixture:
- In a mixing bowl, combine the heavy whipping cream with the mustard.
- Season with salt and pepper to taste. Mix well.

5. Assemble the Gratin:
- Grease a large baking dish with butter or non-stick cooking spray.
- Layer half of the potato slices evenly on the bottom of the dish.
- Spread half of the cauliflower florets over the potatoes.
- Pour half of the cream mixture over the vegetables.
- Repeat with another layer of potatoes, cauliflower, and the remaining cream mixture.

6. Add the Cheese:
- Sprinkle the grated mozzarella cheese evenly over the top of the assembled gratin.

7. Bake:
- Cover the baking dish with aluminum foil and place it in the preheated oven.
- Bake for 30 minutes.
- Remove the foil and bake for an additional 20-25 minutes, or until the potatoes and cauliflower are tender and the top is golden and bubbly.

8. Serve:
- Remove the gratin from the oven and let it cool for a few minutes.
- Garnish with chopped fresh herbs if desired.
- Serve warm and enjoy!

Potato and cauliflower gratin is an easy-to-make, flavorful dish that elevates the simple ingredients of potatoes and cauliflower into something truly special. With its creamy texture and gooey cheese crust, this gratin is bound to become a favorite at your dinner table. Serve it hot, and enjoy the compliments from your loved ones!

Potato and cauliflower gratin FAQ:

What size baking dish should I use for the gratin?

A large baking dish, approximately 9x13 inches, is ideal for this gratin recipe. This size will allow for even layering and proper baking of the potato and cauliflower.

How can I tell when the gratin is done baking?

The gratin is done when the potatoes and cauliflower are tender, and the top is golden and bubbly. You can test the doneness by piercing the vegetables with a fork to ensure they are soft.

Can I substitute heavy cream with a lighter option?

You can substitute heavy cream with half-and-half or whole milk, but the gratin may be less rich and creamy. Keep in mind that cooking times might slightly vary.

How should I store leftovers?

Store leftover gratin in an airtight container in the refrigerator for up to 3 days. Reheat in the oven at 350°F (175°C) until warmed through.

What type of mustard works best in this recipe?

Dijon mustard is recommended for its tangy flavor that complements the cream and cheese, but you can also use yellow mustard if that's what you have on hand.

Cooking Tips:

- Use a mandoline to slice the potatoes evenly for a consistent texture and cooking time.

- Blanch the cauliflower briefly before adding it to the dish to ensure it cooks through completely in the oven.

- Mix the heavy whipping cream with the mustard well before pouring it over the vegetables to ensure even distribution.

- Cover the dish with foil for the first half of the baking time to prevent the cheese from burning.

- Let the gratin rest for a few minutes after baking to allow the flavors to meld and the dish to set.

Nutrition Facts

8 Servings
Calories 250kcal
Protein 7g
Carbohydrates 30g
Fiber 4.33g
Sugar 3.25g
Fat 12g

Potato and cauliflower gratin