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Home Potato Recipes

Truly Crunchy Roast Potatoes

By:Nagi
Published:6 Feb '15Updated:24 Mar '23
250 Comments
Recipe v

To me, the perfect roast potato has a thick, golden, super crunchy crust, it is fluffy and moist on the inside and perfectly seasoned. How many times have you gone to the effort of making a spectacular roast dinner, only to be let down by less than perfect roast potatoes?

Want to try the deluxe version? Head over to Duck Fat Potatoes!

Truly Crunchy Roast Potatoes - this has a really thick, crunchy crust! Par boil, rough up the surface, dust with semolina then bake in a very hot oven in preheated oil. Based on a Nigella recipe.

Here’s why this recipe makes Truly Crunchy Roast Potatoes:

1) par boiling the potatoes and roughing up the potatoes creates more “suction” for the surface to absorb fat which is how you make potatoes crunchy and creates the extra thick crust;

2) the potatoes are lightly coated with semolina which creates extra crunch;

3) the potatoes are poured into a pan preheated with hot oil; and

4) the oil used is a high smoke point oil (peanut, safflower, rice bran, sunflower oil)- the hotter the oil when the potatoes go in, the better the crust.

Above all else, the 3rd and 4th points are the key. It makes all the difference and doesn’t take any extra time because the oil is heated in the pan while the oven is preheating. If you don’t have time to par boil, then cut the potatoes up smaller and dust with semolina (but it doesn’t stay on well as when you do this after par boiling), use the preheated hot oil method and you’ll notice the potatoes are a lot crunchier.

Truly Crunchy Roast Potatoes - this has a really thick, crunchy crust! Par boil, rough up the surface, dust with semolina then bake in a very hot oven in preheated oil. Based on a Nigella recipe.

This recipe for roast potatoes came after I watched Nigella on a Christmas Special a number of years ago making her perfect roast potatoes. It changed the way I made potatoes forever, and I have never looked back.

Nigella’s recipe is rather indulgent. It is made using goose fat – A LOT of it, around 2 cups (640g/1 1/4lb). I remember reading in the news that the first year her Christmas Special aired, goose fat sold out all over the UK!!

We didn’t have that problem here in Australia because goose fat is expensive – it’s around $15 to $20 per can and you need TWO of them. So basically, making Nigella’s roast potatoes would cost close to $40! Duck fat is the closest substitute, but it is expensive as well, around $12 to $15 per can.

I have made this with both goose fat and duck fat, and it is sensational. I used fat rendered from roasting goose and duck, not store bought fat – I don’t think I could ever justify such a cost, not even for potatoes!

There is a distinct flavour using goose or duck fat that can’t be replaced with any bottled oil. BUT you can still achieve the same level of crunchiness, using the same method as Nigella does but with specific types of cooking oils instead of goose fat. And using a lot LESS oil too.

I call this Perfect Roast Potatoes for Normal People. Nigella’s Perfect Roast Potatoes is for wealthy people who can afford $40 roast potatoes! (Or if you live in the UK, where goose fat is MUCH cheaper!).

I’ve provided directions for Nigella’s recipe in the notes. Just in case you are one of “those” people!

Slow Roasted Rosemary Garlic Lamb Shoulder

I made these roast potatoes to go with a Slow Roasted Rosemary Garlic Lamb Shoulder. You can’t bake them at the same time because of the different oven temperatures required, but lamb shoulder can be set aside to rest for up to a couple of hours before having to reheat it. So the timing works very well!

Oh, the other thing worth noting is that the potatoes will be crunchy when they are a golden colour with only a few bits of dark brown parts. Standard roast potato recipes are typically darker brown.

Love to hear what you think if you try it! Shout out if you have any questions at all. 🙂

– Nagi

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Truly Crunchy Roast Potatoes - par boil, rough up the surface, dust with semolina then bake in a very hot oven in preheated oil. Based on a Nigella recipe.

Truly Crunchy Roast Potatoes

Author: Nagi | RecipeTin Eats
Prep: 15 mins
Cook: 1 hr
Total: 1 hr 15 mins
Potatoes, Side
4.99 from 78 votes
Servings6 - 8
Tap or hover to scale
Print
  • 190
Roast potatoes that have a thick, crunchy crust and are soft and fluffy on the inside. Based on a Nigella Lawson recipe, except she uses goose fat instead of cooking oil. Directions for her recipe are included in the notes. You can cut down on the fat if you want, but the less the oil, the thinner the crunchy crust and the less crunchy it will be. I do not recommend reducing it less than 1/3 cup. These potatoes are the perfect accompaniment to the Slow Roasted Rosemary Garlic Lamb Shoulder and can be made while the lamb is resting.

Ingredients

  • 2/3 cup / 165 ml oil - it must be one of the following: Safflower Oil , Rice Bran Oil, Peanut Oil, Corn Oil, Sunflower Oil. I used peanut oil. (Note 1)
  • 3 lb / 1.5 kg potatoes (Note 2)
  • 2 tbsp semolina (best substitute is polenta)
  • 2 tsp salt (increase to 3 tsp if you have a salty palette) (Note 3)

Instructions

  • Pour the oil in a metal or cast iron baking dish and place in the oven. Crank up your oven to as high as it will go (mine is 250C/480F fan forced).
  • Boil a large pot of water. Peel and cut the potatoes into large pieces, about 6cm/2.2" wide. (Note 4)
  • Boil the potatoes for 10 minutes. Drain then return to the pot.
  • Scatter over the semolina and salt. Clamp the lid on and give the pot 5 good shakes to rough up the potatoes. Leave the lid on and set aside.
  • The oil should be hot enough by the time the oven comes to temperature. Test it by tossing in a pinch of potato - it should sizzle straight away.
  • Pour the potatoes in (be careful of oil splashing). Working quickly, use an egg flip to toss the potatoes in the oil, spread them out as best you can then put the pan to the oven.
  • Turn the oven down to 220C/425F. Roast for around 50 minutes, possibly up to 1 hr 15 minutes (Note 5), turning once during baking. They are ready when they are a golden brown with some browned edges and they are crunchy. (Note 6)
  • Serve immediately! They will stay crunchy for around 30 minutes, but the faster you get them on the table, the better! They also crisp up pretty well when reheated - reheat @220C/425F for around 15 minutes (from room temp, add 5 min from fridge).

Recipe Notes:

1. One of the reasons that Nigella's recipe works is because the smoke point of duck and goose fat is so high. Coating the potatoes in the hot oil when they go into the oven helps immensely in creating a crunchy crust. The hotter the oil, the better the crust.
The oils I have listed have high smoke points i.e. they can be heated to a high temperature in the oven without smoking.
2. Perfect roast potatoes start with the right potato. It has to be a potato with a high starch content so it will bake with a fluffy inside and will soak up the oil to form a crusty exterior.
Australia - the common dirt brushed potatoes (Sebago) work great with this, it's a great all rounder. Otherwise, any of these are great all rounder potatoes for this: Desiree, Golden Delight, Kennebec, King Edwards, Pontiac, Red Rascal, Royal Blue, Spunta.
US - russet is ideal. Yukon Gold is not suitable.
UK - Maris Piper is a good all rounder which is suitable and readily available in all the supermarkets. King Edwards and Desiree are also great.
3. This might seem like alot of salt but you lose some of it in the roughing up.
4. Size matters. If the potato is too small, they will overcook before the outside becomes crunchy.
5. The roasting time depends on the strength of your oven, oil, how much you preheated the oil, and how heavy based the roasting pan is.
6. These potatoes do not roast to a dark golden brown that you may be used to with ordinary roast potatoes. They will be crunchy when they are a golden brown colour with only some browned edges.
7. Nigella's recipe has the same steps except she uses goose fat instead of normal oil. Her recipe calls for 1lb 5oz / 640g of goose fat which is 2 cans. Also she uses 5lb/2.5kg of potatoes which doesn't fit into any of my pans so I reduced the amount of potatoes.
Did you make this recipe?I love hearing how you went with my recipes! Tag me on Instagram at @RecipeTinEats.

Nutrition assumes 8 servings.

Truly Crunchy Roast Potatoes Nutrition

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250 Comments

  1. SF says

    March 11, 2023 at 6:17 pm

    Could I par boil these, coat them and then let them sit for a while before cooking….due to an event that we have guests coming in after

    Reply
  2. Deborah March says

    January 13, 2023 at 10:47 pm

    5 stars
    Once again…culinary excellence! Beautifully crispy and crunchy on the outside, and nice and fluffy and hot on the inside. I paired them with roast lamb, but these simple potatoes were the stars of the meal. THANK YOU!

    Reply
  3. Steph says

    September 8, 2022 at 8:33 am

    If the potatoes are frozen after the par boiling for an event that needs to be prepared ahead, what cooking instructions do you suggest if cooking from frozen?

    Reply
    • SF says

      March 9, 2023 at 10:43 pm

      Would like to know this too please

      Reply
  4. Joanne says

    August 8, 2022 at 7:39 pm

    5 stars
    These are sensational. I had no semolina or polenta so substituted Cornflake crumbs that I use for schnitzels. Truly fabulous. Thanks again Nagi

    Reply
  5. Sarah in the uk says

    June 4, 2022 at 2:24 am

    5 stars
    The best roasties ever. I’m often disappointed with my own efforts to get the perfect crunch and fluffy yet moist inside. To the point I had stopped making them. Equally disappointed when we go out for a roast..but these were awesome. So so good. Mine browned up lovely but did baste them a few times. Thankyou

    Reply
  6. Abigail says

    May 18, 2022 at 2:19 am

    I just LOVE your recipes!!!

    Reply
    • Nagi says

      May 18, 2022 at 1:24 pm

      Thank you Abigail! I’m happy you are enjoying cooking them! N x

      Reply
  7. Tom says

    April 18, 2022 at 11:10 am

    Absolutely perfect – crunchy, fluffy in the inside and looked amazing. Made your Greek style slow cooked lamb for Easter and had to have these with it! I used rendered beef fat and the flavour went perfectly with the roast.

    Reply
    • Nagi says

      April 18, 2022 at 10:30 pm

      Those would be sooooo good with the roast lamb!! N x

      Reply
  8. Trent says

    April 17, 2022 at 9:34 pm

    5 stars
    Honestly, my whole family agreed that these are the single best potatoes we’ve ever eaten! We devoured these along with Nagi’s Slow Roasted Rosemary Garlic Lamb Shoulder – OMG! Folks, you MUST make these!

    Reply
    • Nagi says

      April 17, 2022 at 10:28 pm

      I am so glad you enjoyed them Trent!! Try my duck fat version next time!!! N x

      Reply
      • Trent says

        April 17, 2022 at 10:32 pm

        Looking at both recipes, I actually did a mash up and replaced 1/3 of the oil with bacon fat. Wonderful! Thanks for the inspiration, Nagi!

        Reply
  9. Lucie says

    March 13, 2022 at 8:26 pm

    5 stars
    Look, all I’m saying is I didn’t have semolina, any of the oils you recommend and used olive oil
    AND
    They’re still the crunchiest and best roast potatoes I’ve ever made.
    My 5 year old are about half of them.
    Another smash hit.

    Reply
    • Bel says

      April 13, 2022 at 4:35 pm

      I had exactly the same experience Lucie! I only had vegetable oil and no semolina, and they were 11/10!!

      Reply
  10. Polly says

    December 27, 2021 at 5:57 pm

    5 stars
    First time success for crunchy roast potatoes. This will be my go to recipe from now on. Made for christmas the day before and after reheat, still delicious and crispy. Thanks Nagi, very happy with this one, particularly the do ahead tips which made the juggling oven space so much easier when cooking for a large crowd. 1 of 4 of your recipes I used for Christmas.

    Reply
  11. Deni says

    December 24, 2021 at 8:03 am

    Hi Nagi, can I peel and par-boil the potatoes the day before roasting? If so, how do I store them in the fridge? Thanks,
    Deni xx

    Reply
    • Anne Joseph says

      May 23, 2022 at 8:30 pm

      Hi Nagi, so how to keep peeled, par boiled potatoes for roasting overnight?is it a good idea?

      Reply
    • SF says

      March 9, 2023 at 10:45 pm

      I would love to know this too please

      Reply
  12. Kate says

    December 22, 2021 at 10:47 pm

    Hi there, if I’m doing sweet potatoes as well can I use same method in same pan or totally different? Thanks

    Reply
  13. Ria says

    December 21, 2021 at 12:43 am

    Hey Nagi! Great recipe! If I’m doing this potatoes with your lamb shoulder roast recipe, does that mean that when I put the potato tray into the oven at step 8 of the lamb shoulder roast, the oil does not need to be sizzling hot? Or do you recommend I hear the oil in a pan first, pour it into the tray and then put in the potatos and stick it in the over at step 8 of the roast?

    Reply
    • Nagi says

      December 21, 2021 at 4:11 pm

      I would heat it first Ria! N x

      Reply
  14. Alfie MCCaffrey says

    November 19, 2021 at 3:16 am

    Have you tried doing your roast spuds in pure lard rendered from the leaf fat off organic pigs.

    Reply
  15. MICHELLE COPPEL says

    November 13, 2021 at 10:41 am

    what can I substitute the semolina with – I need a gf friendly recipe

    Reply
    • Nagi says

      November 15, 2021 at 4:04 pm

      Hi Michelle – cornmeal or polenta would give a similar crunch and is g/f. N x

      Reply
  16. Marco says

    October 25, 2021 at 3:41 pm

    Is there a rule of thumb re how much oil to put in the tray in terms of depth? Ie. half inch of oil etc.

    Reply
    • Nagi says

      October 26, 2021 at 11:35 am

      Hi Marco. I used a 9 x 13 roasting pan and the depth was just under a half centimetre. Try to stick to the pan size and amount of oil in the recipe as potatoes suck up oil and you don’t want it to get greasy. But if your pan is much bigger you might have to add a bit more oil. N x

      Reply
      • Marco says

        November 10, 2021 at 8:54 am

        Thanks, Nagi! They turned out beautifully! Perfect recipe as always from you!

        Reply
  17. Sara says

    October 9, 2021 at 1:29 am

    Is it possible to make this the day before?

    Reply
  18. Steve says

    October 3, 2021 at 6:24 am

    Lard works just as well as duck fat, and it’s far, far less expensive.

    Reply
  19. Lorraine says

    September 16, 2021 at 2:31 pm

    Hi Nagi, always fantastic recipes thank you. Can we roast these potatoes in a frying pan at all

    Reply
    • Nagi says

      September 16, 2021 at 3:03 pm

      You just won’t get the same effect without having the high oven heat unfortunately. N x

      Reply
  20. mich says

    September 12, 2021 at 3:09 am

    Hello! Could I please check if I could use butter in this recipe?

    Reply
    • Nagi says

      September 12, 2021 at 10:09 am

      Not for this one sorry – it must be one of the oils listed due to their high smoke point. Butter will burn. N x

      Reply
    • Jon says

      November 15, 2021 at 7:34 pm

      Hey mich, while regular butter has a low smoke point, clarified butter or ghee has a high smoke point and is perfect for these.

      Reply
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