Horseradish Cheddar Cheesy Mashed Cauliflower Gratin
Cheesy Mashed Cauliflower Gratin is a fluffy side dish kicked up with Horseradish Cheddar Cheese. This light and healthy vegetable side dish can be prepared ahead for a busy weeknight and is a delicious veggie for a holiday meal or an elegant dinner. Everyone will love this keto-friendly mashed cauliflower casserole.
Lose the mashed potatoes and pick up one of the best gluten free casserole recipes that’s also a low carb recipe!
Disclosures: Samples of Cabot cheese were provided to me at no cost by the Cabot Creamery Cooperative. I was under no obligation to create a recipe or write this post. All opinions are my own.
I think The Hubby and I were clearly fed way too many mashed potatoes when we were kids because now we just don’t like them. Occasionally I’ll make some sort of smashed potatoes that are jazzed up with something flavorful and left kinda chunky – like this Balsamic Caramelized Onion Smashed Potatoes or Homestyle Bacon Cheddar Mashed Potatoes, and that is fine.
So when a pile of white stuff shows up on The Bug’s plate, even he knows it’s cauliflower. And he is cool with that.
I love my kid as much as he loves the mashed cauliflower.
Now, I’m not gonna try to tell you that cauliflower gratin tastes like mashed potatoes. Nobody buys that lie anymore. But I like cauliflower and my family likes cauliflower. So when I say that we are having cauliflower with dinner, I don’t get any complaints. If you want to try to fool your kids, that’s on you. 🙂
Horseradish Cheddar Cauliflower Gratin
How to Make Cauliflower Gratin with Horseradish Cheddar
- Start by steaming the cauliflower until it is very tender.
- Puree it with egg, Horseradish Cheddar Cheese, and Greek yogurt.
- Then put it in a baking dish and pop it in the oven to give it that fluffy texture just like mashed potatoes.
Is cauliflower gratin gluten-free?
A traditional gratin (or the extra fancy term, au gratin) is a dish with a baked topping of bread crumbs and cheese. To make this a gluten-free gratin, the bread crumbs are left out. But trust me; this cheesy mashed cauliflower casserole is equally delicious without them.
Nice and fluffy, but because you add Greek yogurt and egg, and then bake it, there is structure to it. It’s not super creamy (though it is smooth), and if you let the cauliflower drain well, it won’t be watery either. Then you get the sharp cheddar cheesiness and the little kick of horseradish, which totally isn’t overwhelming. Evidence – I had an almost four-year-old and a one-year-old shoveling this in their mouths.
What do you serve with Cauliflower Gratin with Horseradish Cheddar Cheese?
- The first time I made the cauliflower gratin, we ate it with lemon herb slow cooker roast chicken, and it was wonderful.
- I think it would be awesome with a nice steak on the grill.
- For a gluten free St. Patrick’s Day, I especially like it with my Easy Slow Cooker Corned Beef.
- For Easter and Passover, the creamy little kick of horseradish would be amazing with ham or brisket.
- And around Christmas, you can’t go wrong serving this Horseradish Cheddar Cauliflower Gratin with Cranberry Crusted Prime Rib.
Can you make gratin ahead of time?
One great thing about this easy gratin recipe is that you can prepare all of part of it in advance, which makes it ideal for busy weeknights OR holiday meals, where you have to prepare a lot of dishes.
To make the cauliflower gratin ahead:
- Steam the cauliflower, then let it cool down and dry off (that actually keeps it from being too watery).
- OR, get the entire mashed cauliflower casserole prepared and refrigerate it unbaked, or bake it off completely then reheat it in the oven to get the cheese extra toasty. (That’s what I did since I was taking photos at around 3 in the afternoon).
And if you are having a fancy little dinner party, you can put it into individual ramekins, as I did with this Whipped Cauliflower Gratin. Just adjust your baking time a bit.
If you like the Mashed Cauliflower Gratin recipe, try these recipes, too!
- Baked Cauli-Tots
- Browned Butter Whipped Butternut Squash
- Butternut Squash and Cheddar Potatoes au Gratin
Some other great gratins can be found on my friends’ blogs. There’s a fabulous recipe for Brussels Sprouts Gratin on The Hungry Couple. Grandbaby Cakes adds some veggies to her taters with Potato and Squash Gratin. Bacon makes everything better, so here’s a Cauliflower Bacon Gratin from The Reluctant Entertainer. And Spaghetti Squash and Kale Gratin from All Roads Lead to the Kitchen is totally creamy and loaded with veggies.
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Here are a couple of items you might need to make the mashed cauliflower:
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Cauliflower Gratin Recipe with Horseradish Cheddar Cheese
This simple low carb side dish is simple to make and tastes amazing. It’s easy enough for a weeknight dinner, but special enough for a holiday meal. You could serve it with many of these easy low carb dinner recipes.
I hope you’ll leave a comment and give it a FIVE STAR rating or share a photo on this pin on Pinterest!
Cauliflower Gratin with Horseradish Cheddar Cheese
- Preheat your oven to 400°F, and lightly coat a 2 quart casserole dish with oil or cooking spray.
- Cut the cauliflower into large florets, discarding the tough stem, and steam over boiling water until very tender.
- Drain thoroughly, and allow to cool slightly so that some of the excess moisture evaporates.
- Place the cauliflower, Greek yogurt, egg, 3/4 cups of the cheese, salt, and pepper into a blender or food processor, and process until smooth.
- Transfer the cauliflower to the prepared dish and sprinkle with remaining cheese, and paprika, if desired.
- Bake for 25-30 minutes, or until heated through and browned on top.
Enjoy! Originally published on Apr 8, 2014.