Roasted Mustard Cauliflower

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Roasted Mustard Cauliflower-this easy vegetable side dish is full of flavor and goes well with any meal. 

Roasted Mustard Cauliflower Recipe

I have a confession, I am 100% obsessed with cauliflower. You shouldn’t be too surprised since I have been posting a lot of cauliflower recipes lately…Cauliflower Bolognese, Cauliflower Lentil Sloppy Joes, and Roasted Cauliflower Orzo Salad. I was going to take a break from cauliflower, but it was on sale so I was forced to make another recipe:) I made Roasted Mustard Cauliflower and I am so glad I didn’t quit cauliflower because this easy recipe is AMAZING!

Roasted Mustard Cauliflower Recipe

I wasn’t going to share this recipe on the blog for awhile because I thought you were probably all sick of my cauliflower obsession, but I shared a teaser on Instagram stories and I received A TON of messages from people begging for the recipe. So I guess you guys are obsessed with cauliflower too. YAY! We should start a cauliflower club. All of the cool kids will want to join us. We can wear cauliflower t-shirts and maybe even make cauliflower hats. Ok, maybe not so cool. Forget that whole club idea:)

Roasted Mustard Cauliflower Recipe

But don’t forget about this Roasted Mustard Cauliflower recipe because it is the best! You only need six simple ingredients to make this recipe: cauliflower, olive oil, Dijon mustard, whole grain mustard, garlic, and lemon juice.

Roasted Mustard Cauliflower Recipe

Toss the cauliflower in mustardy goodness sauce and roast until crispy and caramelized on the edges. The extra crispy pieces are my favorite. I have to fight my boys for those. Yes, my boys ate this cauliflower and they loved it too! Roasting the cauliflower brings out the BEST flavor and the mustard sauce makes it even better.

This Roasted Mustard Cauliflower is an easy side dish and goes great with any meal. I could eat it every single day. Cauliflower club for life! Oh yeah, we weren’t going to do the whole club thing. Maybe it will have to be a secret club. I won’t tell if you won’t tell:)

And make sure you are following me on Instagram and Instagram stories. I share a lot of behind the scenes in the story section. Just click on my face in the little circle at the top of Instagram and you can follow along!

If you like this Roasted Mustard Cauliflower, you might also like:

Roasted Mustard Cauliflower Recipe

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Roasted Mustard Cauliflower

This easy vegetable side dish is full of flavor and goes well with any meal. Kids and adults love this one!
4.85 from 13 votes


  • 1 tablespoon olive oil
  • 1 tablespoon fresh lemon juice
  • 1 tablespoon Dijon mustard
  • 1 tablespoon whole grain mustard
  • 2 cloves garlic minced
  • 1 head of cauliflower outer leaves removed and discarded, cut into bite-sized florets
  • Kosher salt and black pepper to taste


  • Preheat the oven to 400 degrees F.
  • In a large bowl, whisk together the olive oil, lemon juice, Dijon mustard, whole grain mustard, and minced garlic. Add the cauliflower florets to the bowl and toss until the cauliflower is well coated.
  • Place the cauliflower on a large baking sheet. Season with salt and black pepper, to taste. Roast for 25-30 minutes, stirring once, or until the cauliflower is crispy and browned on the edges.
  • Remove from the oven and serve warm.

Have you tried this recipe?

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I'm Maria and my husband is Josh. We share a love of cooking, baking, and entertaining. We enjoy creating recipes that are simple, fresh, and family friendly. We love sitting around the table with good food, good conversation, and good friends and family! Our kitchen is always open!
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  1. I don’t judge – cauliflower is the best! However, I haven’t tried roasting them before (only for a roasted cauliflower & garlic soup) so I’m definitely going to give this a try! Sounds like a good idea 🙂

  2. I am 100% with you on the love for roasted cauliflower, and this looks amazing. Thanks for the shout-out for my Cheesy Baked Cauliflower Tots too!

  3. Whole grain mustard is one of my favorite ingredients! (As long as I don’t tell anyone I added it because they all “hate” mustard lol)

  4. I just happen to have some cauliflower leftover from another recipe that I needed to find a way to use…guess who is trying this recipe for lunch tomorrow?

  5. Easy to make and is very delicious!  Thanks! My daughter and I made it for dinner and everyone loved it!  Great for mother daughter bonding time too! 

  6. There is something about cauliflower and mustard that is just so good! I make it all the time, except I always add some cheddar cheese in the mix because who doesn’t love some cheese? I love the way you do this! I do’t know why cauliflower is just now becoming popular! It’s so yummy!

  7. My husband who does not like cauliflower liked this recipe! He hadn’t tried it again since childhood and was always against the veggie. Not anymore!

  8. 5 stars
    Made it….love it….makin’ it again tonight! Thanks! Will no longer be afraid of the lowly cauliflower! Cat cox and the gang

  9. how about addind melter chedder cheese to your roasted mustard then dipping the cauliflower in the sauce before roasting?

  10. 5 stars
    Beautiful flavor~I had leftover cauliflower and fresh beets so I tossed them together. Simply delicious! 

  11. 5 stars
    Since going vegan I’ve had a hard time coming up with tasty appetizers like this, I was very impressed by the flavors in this recipe! Thanks for sharing!

  12. 4 stars
    Made this recipe with frozen cauliflower, broccoli and carrots. It was delicious. Added a bit of chili flakes for a kick.

  13. I just felt the need to THANK YOU for making me laugh soooo much while reading through your post 🙂 I would SO buy a Cauliflower t-shirt tbh hahaha
    I’m totally obsessed with cauliflower too and yesterday while I was having dinner (of course with roasted cauliflower, because roasting brings out the BEST flavours), I was already thinking about the next cauliflower recipe I would make, and cauliflower+mustard seemed like a strangely good idea.
    So I googled it and BOOM your post comes up haha Will try it soon!
    xx Sofia

  14. 5 stars
    Such a delicious way to prepare cauliflower, thank you for sharing this recipe! We will be having this side dish again and again!