Cauliflower with Mustard-Lemon Butter
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 17 Jan 2026
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This roasted cauliflower with mustard-lemon butter is a sophisticated yet simple vegetarian side dish that perfectly balances earthy and zesty flavours. By slicing the cauliflower into thin steaks, you create more surface area for the butter to caramelise, ensuring every bite is infused with tangy citrus and the subtle heat of whole grain mustard.
Ideal for a Sunday roast or as a light accompaniment to grilled proteins, this versatile recipe works equally well served hot or at room temperature. The addition of fresh parsley adds a vibrant finish to the dish, making it a colourful and nutritious addition to any dinner table. It is also a practical choice for entertaining, as it can be prepared slightly ahead of time.
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Ingredients for Cauliflower with Mustard-Lemon Butter
1 small head of cauliflower (about 800g)
1 teaspoon coarse kosher salt
90ml (3/4 stick) butter
2 tablespoons fresh lemon juice
2 tablespoons whole grain Dijon mustard
1 1/2 teaspoons finely grated lemon peel
1 tablespoon chopped fresh parsley
How to make Cauliflower with Mustard-Lemon Butter
Preheat oven to 204°C. Butter rimmed baking sheet. Cut cauliflower in half, then cut crosswise into 1/4-inch-thick slices. Arrange slices in single layer on prepared baking sheet; sprinkle with salt. Roast until cauliflower is slightly softened, about 15 minutes.
Meanwhile, melt butter in small saucepan over medium heat. Whisk in lemon juice, mustard, and lemon peel.
Spoon mustard-lemon butter evenly over cauliflower and roast until crisp-tender, about 10 minutes longer. DO AHEAD Can be made 2 hours ahead. Let stand at room temperature. If desired, rewarm in 177°C oven until heated through, about 10 minutes.
Transfer cauliflower to platter. Sprinkle with parsley and serve warm or at room temperature.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
17 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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