Every traditional Sunday roast across Britain demands one essential component: perfectly crispy roast potatoes. While families guard their own cherished recipes and secret techniques for achieving that golden, crunchy exterior, a common kitchen ingredient might hold the key to culinary triumph.
The Simple Ingredient for an Instant Upgrade
According to Molly Adams, a recipe developer at Simply Recipes, a single pantry staple can elevate your roast potatoes to new heights of crispiness. This ingredient, likely already tucked away in your cupboard, is cornflour, known in some regions as cornstarch.
Adams discovered this tip while examining the packaging of frozen chips, noting that a mixture of starches was used to enhance their crispiness. She decided to apply this principle to homemade roast potatoes, with remarkable results.
How Cornflour Works Its Magic
Cornflour creates a dry, starchy coating on the potatoes that actively draws out moisture and accelerates evaporation during cooking. This process is crucial for achieving that desirable browning and satisfying crunch.
The starch particles expand as they absorb the potato's natural moisture. When this moisture evaporates in the oven, it forms a firm, protective shell around each potato, preserving the coveted crispiness throughout the cooking process.
When these starchy potatoes meet sizzling hot fat, they develop a beautifully golden and crispy exterior. The cornflour acts as a delicate barrier, preventing the potatoes from becoming mushy when cooked in fat and ensuring the outer crunch remains perfectly intact.
Step-by-Step Guide to Crispy Perfection
Begin by par-boiling your potatoes in well-salted water until they're just tender. Once cooked, drain them thoroughly in a colander and allow them to steam dry completely. For those pressed for time, Adams suggests a clever shortcut: briefly pop the potatoes in the freezer to speed up the drying process.
When your potatoes feel completely dry with no visible steam rising, season them generously with salt, pepper, and your preferred dried herbs and spices. Adams emphasizes that any starch will tone down seasonings, so be more liberal with your flavourings than usual to ensure they shine through.
Next, give the potatoes a thorough dusting with cornflour. The recommended ratio is approximately one tablespoon of cornstarch for every pound and a half of potatoes. Shake the potatoes vigorously to ensure even coverage of the starchy coating.
The Final Cooking Stage
Transfer the coated potatoes to a well-oiled baking tray or roasting tin, giving them one final toss to ensure every potato receives its fair share of oil. Place them in a preheated oven at 450°F (230°C) and roast for 20 to 25 minutes.
The result, according to Adams, is gloriously golden and exceptionally crispy roast potatoes that will undoubtedly become the star of your Sunday dinner. She describes the finished product as "incredibly crisp on the outside, light and fluffy on the inside, and hold their shape well."
This simple technique transforms ordinary roast potatoes into extraordinary culinary delights, proving that sometimes the most effective kitchen secrets come from the most unexpected places. With cornflour's moisture-absorbing properties and protective coating capabilities, achieving restaurant-quality crispy roast potatoes at home has never been more accessible.
