Cauliflower au gratin is cheesy, creamy, classic comfort food with horseradish to give it a kick and buttery crumbs on top for crunch. Perfect for weekend dinners, holidays, and other special days.
Course Side Dish
Cuisine French
Keyword cauliflower cheese, cauliflower gratin
Prep Time 10 minutesminutes
Cook Time 20 minutesminutes
Total Time 30 minutesminutes
Servings 4servings
Calories 375kcal
Author justalittlebitofbacon
Ingredients
1medium(~2 lb) head cauliflower,cut into bite sized florets
Cheese Sauce
2tbspunsalted butter
2clovesgarlic,minced
2tbsp+ 2 tsp flour,divided
1 1/2cupwhole milk
4ozshredded semi-hard cheese,such as Havarti, Fontina, or Muenster
1ozparmesan cheese,grated
3tbsphorseradish
1/2tspkosher salt
1/4tspblack pepper
Breadcrumbs
1cupfresh breadcrumbs
2tbspunsalted butter,melted
2tbspfresh chopped parsley
kosher salt,to taste
Instructions
Heat oven to 375F.
Steam cauliflower until crisp tender, 5-7 minutes. Blot the cauliflower with a towel to remove any excess liquid and transfer it to a large bowl.
While cauliflower is steaming, begin making cheese sauce.
In a large saucepan, melt the butter over medium heat. Add a little salt and saute the garlic for 30 seconds.
Add 2 tablespoons of flour and whisk with a flat whisk for 1-2 minutes. Pour in milk, increase heat to medium high, and bring to a simmer, whisking frequently and let thicken, about 3 minutes.
Remove the pan from the hot burner before adding the cheese. Now mix the shredded cheese with the remaining 2 teaspoons of flour and add it by handfuls, whisking constantly, until all the cheese is added and the sauce is smooth. Add parmesan and horseradish, taste the sauce, and add salt and pepper.
Mix the fresh breadcrumbs with melted butter, parsley, and a pinch or two of kosher salt. (If you like a very crisp topping, give the breadcrumbs mixture a saute over medium heat for 4-5 minutes.)
To assemble, pour the cheese sauce over the cauliflower and mix well. Then scoop the cauliflower mixture into a casserole dish, 9x13 or equivalent. Top with breadcrumbs.
Bake for 20 minutes, or until the sauce is bubbly and the topping is golden brown.
Notes
Cheese: Feel free to experiment with different cheeses. It's a great way to use up small bits of cheese you have in your fridge.
Making the Sauce: This is yet another recipe where I've used my All Clad Saucier. I really do use it a lot and its curved sides help when whisking.
Breadcrumbs: Use the stale ends of any bread you have on hand and give it a whir in the blender or food processor until they are broken up but still rather rustic looking. (You don't need to get them to the tiny crumbs you would buy in a can.)