Mashed Potato and Cauliflower Gratin Recipe
Introduction
This mashed potato and cauliflower gratin is a comforting side dish that combines creamy textures with a crispy, golden topping. It’s perfect for family dinners or holiday meals when you want something warm and satisfying.

Ingredients
- 3 large potatoes, peeled and cubed
- 1 head cauliflower, cut into florets
- 1/2 cup milk
- 1/4 cup butter
- 1 cup cheddar cheese, shredded
- 1/4 cup breadcrumbs
- Salt and pepper to taste
Instructions
- Step 1: Preheat your oven to 375°F (190°C).
- Step 2: Boil the potatoes and cauliflower in a large pot of salted water until tender, about 15-20 minutes. Drain well.
- Step 3: Mash the potatoes and cauliflower together with the milk, butter, salt, and pepper until smooth and creamy.
- Step 4: Spoon the mashed mixture into a baking dish, spreading it evenly.
- Step 5: Sprinkle the shredded cheddar cheese and breadcrumbs evenly over the top.
- Step 6: Bake in the preheated oven for 20-25 minutes, until the topping is golden brown and bubbly.
Tips & Variations
- For extra flavor, add a teaspoon of garlic powder or chopped fresh herbs like thyme or parsley to the mash.
- Substitute half the cheddar cheese with gruyère for a nuttier taste.
- Use panko breadcrumbs for a crunchier topping.
- Try mixing in some cooked bacon or caramelized onions for added depth.
Storage
Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, warm in the oven at 350°F (175°C) until heated through and the topping is crisp again, about 15 minutes.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use cauliflower only, without potatoes?
Yes, using cauliflower alone will create a lighter gratin, but the texture may be less creamy. You might want to add a bit more butter or cream to compensate.
Can this be made ahead of time?
Absolutely. Prepare the mash and assemble the dish, then cover and refrigerate. When ready, bake as directed, adding a few extra minutes if baking from cold.
PrintMashed Potato and Cauliflower Gratin Recipe
A comforting and creamy mashed potato and cauliflower gratin featuring tender mashed potatoes and cauliflower blended together, topped with melted cheddar cheese and crispy breadcrumbs for a golden finish.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Total Time: 40 minutes
- Yield: 6 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
Vegetables
- 3 large potatoes, peeled and cubed
- 1 head cauliflower, cut into florets
Dairy
- 1/2 cup milk
- 1/4 cup butter
- 1 cup cheddar cheese, shredded
Others
- 1/4 cup breadcrumbs
- Salt and pepper to taste
Instructions
- Preheat Oven: Preheat your oven to 375°F (190°C) to get it ready for baking the gratin.
- Boil Vegetables: In a large pot, bring water to a boil and add the peeled, cubed potatoes and cauliflower florets. Boil until both are tender when pierced with a fork, approximately 15-20 minutes. Drain well.
- Mash Ingredients: Transfer the drained potatoes and cauliflower into a large bowl. Add the milk, butter, salt, and pepper. Mash together until you achieve a smooth and creamy consistency.
- Assemble Gratin: Spoon the mashed mixture evenly into a greased baking dish. Sprinkle shredded cheddar cheese evenly over the top, followed by the breadcrumbs to create a crunchy topping.
- Bake: Place the baking dish in the preheated oven and bake for 20-25 minutes until the cheese is melted, bubbly, and the breadcrumbs are golden brown.
- Serve: Remove from oven and let cool slightly before serving your delicious mashed potato and cauliflower gratin.
Notes
- You can substitute the cheddar cheese with Gruyère or mozzarella for a different flavor profile.
- For a richer gratin, use cream instead of milk.
- To add extra flavor, mix in some garlic or fresh herbs like thyme or rosemary when mashing.
- Ensure the vegetables are well drained to avoid a watery gratin.
- For a gluten-free option, use gluten-free breadcrumbs or omit them and replace with crushed nuts for crunch.
Keywords: mashed potato gratin, cauliflower gratin, cheesy gratin recipe, side dish, comfort food, baked gratin

