Low Carb Radish Au Gratin Recipe for the Keto /Low Carb Diet (2025)

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Yep, Low Carb Radish Au Gratin! Just hear me out before you scroll away😎….

I know that it sounds strange to bake radishes in cheese. But, this is a great side dish if you miss Potatoes Au Gratin.

Is it exactly the same? No. But it’s great in it’s own right and the cheesey sauce, crispy bacon and tender, mild radishes make it a fantastic Keto comfort food.

Jump to Recipe

🥘Ingredients:

• 2 bunches radishes – sliced into rounds or quarters, your choice.

I have done this both ways and I think quartering the radishes is easiest.

• 1 small onion – sliced or chopped and sauteed.

Small onions weigh in at about 4 oz each. If you wanted to cut out a few carbs in this already super low carb side, you could use a leek instead of a regular onion.

• 6 oz bacon – *cooked crispy and chopped

Browned sausage is another great choice is you have bacon burnout. Is that a thing?

Cheese Sauce:

• 2 Cups Cheddar Cheese – *8oz – Shredded. You can use a mix of different cheese if you like. Example – ½ cheddar and ½ Parmesan.

• ¼ cup Heavy Whipping Cream – 4 tbsp

• 2 tbsp Unsweetened Cashew Milk – *or unsweetened almond milk

Cashew milk is creamier than almond milk and I LOVE IT! But, you can use unsweetened almond milk or even more heavy cream if you prefer.

• 2 tbsp butter

You can use coconut oil if you don’t want to use butter.

• ½ tsp garlic powder

Use one fresh garlic clove if you like fresh garlic better.

Optional:

• ½ bunch Fresh Parsley – *chopped. I recommend using this ingredient if you can.

There is something about fresh parsley in this dish that you just can’t get from the dried version. Still, I am a huge fan of making due with what I have and rosemary will do nicely in this dish if parsley is unavailable.

Yes, it’s a completely different flavor profile but it compliments this dish so nicely.

• capers

• chives

👨🏿‍🍳How to make the Au Gratin:

Preparing the radishes:

1.) Slice the radishes into quarters or thick rounds, whatever you prefer.

2.) Boil the radishes in a salted stock pot for 30 minutes or until they have lost most of their red coloring. (That bitter flavor is in the skin).

3.) Strain and rinse all of the water off of the radishes with cold water. (That bitter flavor has now transferred to the water they were boiled in).

4.) They should be light in color at this point. Set aside to let dry as much as possible while you prepare the cheese sauce.

5.) Dice the raw bacon and slice the onion. Saute them together while the radishes are boiling and you are gathering the ingredients for the cheese sauce.

Set aside.

Cheese Sauce

6.) Preheat the oven to 350°F or 177°C. Prepare a medium sized baking dish with olive oil or butter. Alternatively, you can divide into six ramekins.

7.) Put all of the sauce ingredients, minus the reserved ½ cup of cheese in a sauce pan and cook on low/medium.

8.) Stir constantly with a whisk until thick and creamy. DO NOT BOIL. It will burn your cheese sauce and make it grainy.

Add more almond milk if the sauce is too thick, more cheese if it is too thin for your liking.

9.) Turn off the heat and add the radishes and parsley if using to the pot and stir.

Bake

10.) Pour into the prepared baking dish, top with reserved cheese + any additional topping you like and bake @350°F for 35-45 minutes until hot and bubbly.

(I reserved a bit of bacon and onion for topping and then topped with the cheese.)

Serve hot.

📋Tips & FAQ’s:

Can I make this ahead of time?

Yes the Radish Au Gratin will last for 4-5 days in the fridge. Just reheat in the oven or microwave.

Can I freeze the radish au gratin recipe?

I don’t think so. It’ll be separated and funky once it’s thawed.

What’s good with the Au Gratin?

It’s a great side dish with anything you would serve Au Gratin potatoes with.

That’s all for the Radish Au Gratin Recipe!

I hope you try this recipe and love it.

I know it sounds weird but it was a big hit with several family members (I checked because I know how weird it sounds to bake radishes in cheese).

Let me know if you think I’m going off of the deep end by posting this recipe.

As always, leave any questions or comments below and be well!!!!

Cheers to your health!

Brandy

The nutritional information for Keto Radish Au Gratin Recipe is provided as a courtesy.

We are pretty careful about our figures but if you ever feel like anything is off please feel free to do your own calculations.