Harissa Roasted Cauliflower

Some dishes manage to be both comforting and exciting, and harissa roasted cauliflower is a fine example of this.
The head of cauliflower turns into a tender and flavourful centrepiece once it’s parboiled, coated with a lively harissa marinade, and then finished in the oven.
Whether you’re serving it as a side dish or a vegetarian main, this recipe promises to bring bold spices, a hint of sweetness, and just enough heat to keep you reaching for another bite.
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Ingredients You’ll Need
Here’s a list of everything you’ll need to make this Harissa Roasted Cauliflower recipe:
- 1 cauliflower
- 2 tbsp olive oil
- 2 tbsp maple syrup
- 1 tbsp harissa paste or spice seasoning
- Salt
Celebrating the Depth of Harissa
Harissa is a robust blend of chillies and aromatic spices originating from North Africa.
It can come as a paste or a dried seasoning, but either way, it adds a smoky intensity and gentle heat to whatever it touches.
When paired with cauliflower’s mild taste, harissa shines through with its distinctive depth.
This balance of flavours means you can easily adapt the dish to your spice tolerance—simply adjust the amount of harissa you use, and you’re good to go.
Balancing Heat with a Touch of Sweetness
Adding something sweet may seem surprising when dealing with spicy ingredients, but maple syrup tempers the heat nicely and creates a well-rounded taste.
The syrup’s subtle caramel-like notes contrast beautifully with the peppery kick of harissa.
This combination also helps the cauliflower develop a slightly sticky crust in the oven, making each slice irresistible.
If you don’t have any maple syrup, you could also explore options like agave nectar or honey for a similar effect.

Parboiling for Tender Perfection
One of the best ways to ensure your cauliflower roasts evenly is by giving it a quick parboil beforehand.
This simple step softens the florets, reducing the overall cook time and allowing your harissa glaze to infuse the cauliflower more deeply.
Parboiling for around ten minutes strikes the ideal balance: the vegetable is neither raw nor fully cooked, which means it can soak up those bold flavours in the oven without turning mushy.

Turning a Cauliflower into a Centrepiece
People often overlook cauliflower, but a whole roasted head can be a stunning addition to the table.
Once it’s out of the oven, you can slice it into thick wedges and serve alongside grains, salads, or simple sauces.
This recipe also works wonderfully if you prefer to separate the cauliflower into florets—just remember to keep an eye on the oven, as smaller pieces can cook more quickly and might be ready before the full 45 minutes.
How to Make This Harissa Roasted Cauliflower Recipe
Step 1: Preheat the oven
Set your oven to 190°C and allow it to heat up fully.
Ovens differ in how quickly they reach the correct temperature, so you may want to switch yours on at least 10 minutes before you start cooking.
Ensuring the oven is properly preheated will help your cauliflower develop an even colour and cook through at a consistent temperature.
Step 2: Parboil the cauliflower
Remove any tough outer leaves from the cauliflower.
Fill a large pot with water and bring it to a rolling boil.
Carefully place the cauliflower into the pot, ensuring it’s mostly submerged, and let it simmer for about 10 minutes.
This quick parboil helps soften the interior so it roasts more efficiently later on.
If you’re worried about over-boiling, you can test the cauliflower by piercing it with a fork—there should be a little give, but the cauliflower shouldn’t be fully cooked or falling apart.

Step 3: Combine the harissa mixture
While the cauliflower is parboiling, get a small bowl and mix together the olive oil, maple syrup, and harissa paste or spice seasoning.
Add a pinch of salt to enhance the flavours.
You’re aiming for a thick, spreadable mixture, so it coats the cauliflower without running straight off.
If you prefer a milder taste, start with half a tablespoon of harissa, then sample it and adjust as you see fit.

Step 4: Drain and cool slightly
Once the cauliflower has finished its brief boil, carefully remove it from the water using a slotted spoon or tongs.
Place it in a colander or on a wire rack to allow the excess moisture to drip away.
Leave it to stand for about five minutes so the surface is as dry as possible.
This pause is crucial, as extra water will dilute your seasoning and could prevent a proper roast from forming.
Step 5: Coat and roast
Transfer the drained cauliflower onto a baking tray lined with foil or parchment paper for easier cleaning.
Use a spoon or a pastry brush to spread the harissa mixture all over the cauliflower.
Don’t forget the underside and any nooks between the florets.
Once it’s fully coated, slide the tray into your preheated oven.
Let it roast for around 45 minutes, or until the cauliflower is beautifully browned and a fork can glide into the centre with minimal resistance.

Step 6: Remove and serve
Carefully take the tray out of the oven.
Allow the cauliflower to rest for a minute or two so the juices redistribute.
You can then slice it into thick wedges or pull it apart into florets.
Arrange it on a platter or serve it directly on your dining table.
This harissa roasted cauliflower can stand on its own as a show-stopping centrepiece, or complement other dishes as part of a nourishing spread.
Frequently Asked Questions
Can I use a different sweetener?
Definitely. While maple syrup has a rich flavour that pairs well with harissa, alternatives like honey or agave can work.
Just note that each sweetener adds its own distinct character, so the end result might taste a bit different.
What if my harissa is extra spicy?
Feel free to reduce the amount of harissa you use, or mix it with more oil and syrup to tone down the heat.
You can also serve the dish with a cooling yoghurt sauce on the side.
How do I check if the cauliflower is done?
A useful method is to pierce the centre with a fork or knife.
If it slides in easily, the cauliflower is cooked through.
If you still meet resistance, give it a few more minutes in the oven.
Is there a way to make this recipe faster?
You can cut the cauliflower into smaller florets before parboiling and roasting.
This will reduce cooking time, though you may need to watch closely to avoid overcooking and drying them out.
How should I store leftovers?
Place any remaining cauliflower in an airtight container in the fridge.
To reheat, pop it in the oven at a low temperature or warm it in a pan with a little oil.

And that’s it for this Harissa Roasted Cauliflower recipe. You can find the whole thing on a handy recipe card just below, so be sure to Pin it for later!
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Harissa Roasted Cauliflower
Ingredients
- 1 Cauliflower
- 2 tbsp Olive oil
- 2 tbsp Maple syrup
- 1 tbsp harissa paste or spice seasoning
- Salt
Instructions
- Preheat the oven to 190 C
- Remove the leaves from the cauliflower and par boil in a pan of boiling water for 10 minutes
- Meanwhile combine the olive oil, maple syrup and harissa in a small bowl
- Drain the cauliflower and leave to stand for 5 minutes for any excess moisture to evaporate
- Coat the cauliflower in the harissa mix and place in the oven
- Cook for 45 minutes, or until the cauliflower is crispy and golden on the outside and a fork can glide into the centre with minimal resistance
- Remove and serve