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Besides the first time making them, they always come off with a soft,straight surface rather than a crunchy, craggy surface full of blisters.

Here is the recipe. The thing making the potatoes crunchy is a slurry (after parboiling the potatoes, you toss them with some oil. Their surface then gets ripped, making the slurry) that coats the surface. Here is a picture before cooking: enter image description here

Here is a picture after cooking: enter image description here

Its smooth and not crunchy. Any idea how to make them crunchy next time?

  • Are you using the same type of potatoes recommended in the recipe? Have you checked your oven temperature with a thermometer? – Catija Feb 2 '18 at 17:58
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    I'd let the potatoes dry out more before coating them with the oil; they should have a dry surface. – Max Feb 2 '18 at 18:04
  • @Catija Yukon Golden is not available here in Israel – Bar Akiva Feb 2 '18 at 18:59
  • @Max You mean after parboiling yeah? Because the author only lets them sit for 30 seconds before tossing them in oil. – Bar Akiva Feb 2 '18 at 19:00
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    Then what did you use instead? The article attached to that recipe is very clear about which types of potato will give good results and which will not. – Catija Feb 2 '18 at 19:00
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Your result looks like too much water, and too high a roasting temperature for an even, golden crust. (The ones illustrated in the recipe don't look as if they achieve that, either).

My way: Choose a floury, not a waxy, potato variety.

Par-boil from cold in salted water, until 3/4 cooked, a skewer should meet resistance before reaching the middle. (about 9-10 minutes, your size.). Drain in a colander, and leave to dry completely, but not cool.

Pre-heat your fat in the roasting tray, a thin layer. Transfer the potatoes to half-fill a dry bowl, pour over the hot fat, and shake gently to break up the surface. The roasting tray should be big enough to give the potatoes room to breathe, they shouldn't be crammed in.

Roast at about 180C (fan) for 40 minutes or so, turning once or twice. If your oven gets steamy, open the door a crack every now and then to let the steam out. Before serving, keep warm, uncovered, somewhere that doesn't trap steam, on paper towels to wick away excess fat.

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