This tangy creamy, cheesy microwave cauliflower recipe is one even cauliflower haters will love. Cooking a whole head of cauliflower in the microwave is a super easy side dish. Topped with a mixture of mayonnaise, mustard and slices of American cheese.

I’ve always claimed that even cauliflower haters would cozy up to this microwave cauliflower recipe. And being married to a cauliflower hater, I can attest that even the Ranch Hand likes this one.
Way back in the dark ages, when microwave ovens were first available for purchase for our home kitchens, I got one for Christmas.
It was a Radar Range and I wish I had a photo of it. Compared to our sleek modern versions, it’s probably somewhat laughable. The appliance came with a cookbook illustrating how you could magically prepare anything from pot roast to desserts …in a flash.
This new appliance seemed so daunting, I was compelled to take a class offered at our local Sears store. A demonstration type class, that lasted a couple of hours. This is where I learned of this microwave cauliflower with cheese recipe, a recipe to microwave a whole head of cauliflower. I’ve been making it ever since, and regularly for over 40 years.
What You Can Expect From This Recipe
Some nights everyone just needs a vegetable on the table fast. No roasting pan. No oven preheating. No pile of dishes waiting for me afterward.
- Ready in about 15 minutes = easy vegetable side dish for busy weeknight dinners.
- Uses simple pantry ingredients.
- To steam cauliflower in the microwave yields a tender texture and sweet flavor.
- Once the topping of mayonnaise, mustard and American cheese are added the tangy, creamy cheesy flavors truly enhance the entire experience.
- A great way to get cauliflower skeptics to eat their vegetables.
- Naturally low carb and gluten free
How Long Does It Take To Microwave Cauliflower?
A whole head of cauliflower takes about 8 to 12 minutes to cook in the microwave. Place it in a covered microwave-safe dish with 2 to 3 tablespoons of water and cook on high until fork tender. Cooking time varies based on the size of the cauliflower and the power of your microwave. Adding water to the dish acts as a steam bath.
Microwave on High:
- Small head (1½ pounds): 8-9 minutes
- Medium head (2 pounds): 10-11 minutes
- Large head (2½+ pounds): 11-12 minutes
How Do You Know When It’ s Done?
Insert a knife or fork into the thickest part near the stem. It should slide in fairly easily but still meet a little resistance. If it’s completely soft, you’ve probably gone a bit too far. But it will still be good.
Let’s get started:
Ingredients To Make Microwave Cauliflower

- Cauliflower: 1 whole head. Any size will do. I always grab a large sized head of cauliflower for more servings and leftovers.
- Mayonnaise: A good quality mayo works well for cooking. Dukes or Best Foods are good here.
- Mustard: Plain yellow prepared mustard.
- Onion: Fine diced sweet or yellow onion.
- American Cheese: Individual slices of American Cheese is a beautiful melting cheese.
Pro Tip: To keep the sauce nice and creamy smooth, try grating the onion. Use your old fashioned box grater.
Ingredient Substitutions:
- Cheese: Substitute grated cheese for the American Slices. A medium cheddar works well. I highly recommend grating the cheese yourself as the pre-grated bags of cheese contain ingredients to keep it from sticking together in the bag. In turn, those ingredients will keep the cheese from melting as well.
- Onion: To make things even easier, I’ve used dried onion flakes for this recipe. Just mix the flakes into the sauce and let it sit a few minutes to soften before cooking.
How To Make Cauliflower In The Microwave

- Step 1: How to remove the cauliflower core. Using a sharp large chef knife, cut around the core area and remove the protruding core and outer leaves of the cauliflower.

- Step 2: Ready to microwave: Place the cauliflower, core side down in a deep 2 – 3 quart microwavable casserole dish. Add 2 tablespoons of water, cover and cook for 8 – 10 minutes on high.

- Step 3: Make the cheese sauce. While the cauliflower is cooking, combine the mustard, mayo, and onions and blend together with a fork.

- Step 4: Remove the cooked cauliflower from the microwave and spoon the sauce over the top. Drain any excess water if necessary.

- Step 5: Add the Sauce: Using the back of a spoon, coat the cooked cauliflower with the mayo, mustard sauce. Make sure to coat the cauliflower as far down the sides as you can.

- Step 6: Add the Cheese: Place the slices of American Cheese on the top of the sauced cauliflower. Alternate the angle of the cheese slices for even melting.

- Step 7: Cover the pan with the lid and return the cauliflower to the microwave. Cook on high for 2 minutes to melt the cheese and heat the mayonnaise mustard sauce. Let the cauliflower stand, covered, for two minutes before slicing.

- Step 8: How to Serve Microwave Cauliflower: Using a sharp knife, slice the cauliflower in wedges and serve immediately.
Variations:
Living in Colorado most certainly has had a big influence on how I cook. Green Chile peppers seem to find their way into so many traditional recipes. And you bet they’re good with cauliflower. For a Southwestern version try switching things up a bit:
- Add some diced green chiles to the mayo mustard sauce.
- Sprinkle in some New Mexico Red Chile Powder
- Switch out the American cheese for sliced or shredded Pepper Jack cheese
Tips for Success
- Don’t try to make this recipe without a covered dish. You need that steamy atmosphere for the cauliflower to cook evenly.
- If there’s excess water after cooking the cauliflower, drain it before adding the sauce and proceeding with the recipe.
- Overcooking the cauliflower will cause the texture to be mushy.
Storage and Reheating
- Refrigerator: Store any leftovers in an airtight container in the refrigerator for up to 4 days.
- Freezer: Due to the mayonnaise sauce, this is not a good candidate for the freezer. You’ll be disappointed in the texture of the sauce and the cauliflower once thawed.
- Reheating: To reheat, simply microwave individual servings in 20 second increments at 50% power. The 50% power feature is your best friend here, it will keep the sauce and cauliflower from overcooking and keep the sauce from separating.
What To Serve It With
The creamy cheesy sauce turns this simple head of cauliflower into an All-American Comfort Food side dish. Here are some comfort food pairings to complete your meal.
- Old Fashioned Meatloaf = perfect.
- Roast beef, like this Chuck Eye Roast or Sunday Pot Roast With Gravy.
- Pan Fried Chicken with Fried Chicken Gravy.
- Or Beef Tournedos Steak with Red Wine Mushroom Sauce.
FAQ’s
By the way, did you read that the Millennials are throwing American Cheese out of their diets? If you are one that simply doesn’t like processed American cheese, you can most certainly substitute grated cheddar cheese. But it doesn’t melt as beautifully.
I tried cooking this in my Instant Pot and it took longer than in cooking cauliflower in the Microwave. Due to pre-heating, coming to pressure, and releasing pressure, the microwave had it beat by about eight minutes. Score one for the microwave. But yes, you can cook a whole head of cauliflower in the Instant Pot. Just follow the same steps for the microwave recipe.
Microwave powers vary as do the size of a full head of cauliflower. After 8 minutes of cooking the cauliflower in the microwave, remove it and use a fork to test its doneness. If the fork inserts into a tender vegetable, the cauliflower is done. If it feels too crisp, return to microwave and cook 1 – 2 minutes longer.
Did your perfect deep casserole dish not come with a lid? Simple, just cover tightly with plastic wrap. Using a fork , poke a few holes in the plastic wrap.
Recipe for Microwave Cauliflower

Pro Tip – Garnish: I like to sprinkle this microwave cauliflower with something red to enhance the presentation. A pinch of chile powder or paprika works well here.
I hope you give this microwave cauliflower recipe a try. It’s a super easy way to cook a whole head of cauliflower and it’s surprisingly delicious. This is a recipe that you’ll want to make over and over again. It’s that easy.
Explore More Popular Vegetable Side Dishes
And if you’re looking for more side dish recipes, don’t miss my Side Dishes Category. You’ll find lots of tasty recipes, including the most popular side dish recipe on my site for Broccoli Cheez Whiz Rice Casserole.
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Tangy Mustard Cauliflower, Microwave Cauliflower
Ingredients
- 1 head head cauliflower rinsed, core and bottom leaves removed
- 2 tablespoons water
- ½ cup mayonnaise
- 1 teaspoon onion — finely chopped
- 1 teaspoon mustard
- 3 slices American cheese or ½ cup grated cheddar cheese
Instructions
- Place cauliflower in microwavable 2 – 3 quart casserole with lid. Add water and cover with lid or plastic wrap.
- Microwave on high 8 – 9 minutes or till tender crisp. Use a fork to test doneness. If it feel too crisp, return to microwave for 1 – 2 minutes longer.
- In the meantime, combine mayonnaise, onion, and mustard in small mixing bowl. Use a fork to blend into a smooth sauce.
- Once the cauliflower has completed its first cook in the microwave, drain any excess water and spoon mustard sauce on top of cauliflower. Use the back of the spoon to smooth the sauce evenly over the top of and sides of the cauliflower.
- Lay slices of cheese over the top, alternating the way they face so they melt evenly.
- Microwave for 1 – 2 minutes more, covered, to heat topping and melt cheese. Let stand two minutes before serving.
Notes
Nutrition
Microwave Cauliflower Recipe … It’s whats for an easy side dish






















































