If you want oven-baked potatoes with a proper crisp shell, the trick is not more oil. It is better surface drying, the right amount of starch, and a hot tray that starts browning the moment the potatoes hit it.
For the best texture, choose waxy or all-purpose potatoes with fairly even size, then cut them into wedges or chunks so every piece cooks at the same rate. Rinse off excess surface starch, but do not soak them for too long unless you plan to dry them very well afterward. Too much moisture is the enemy of crispness.
The method that gives you a real crust
- Parboil first. Boil the potatoes in salted water for 6 to 8 minutes, just until the edges start to soften. You want the outside to rough up slightly, not collapse.
- Drain and steam-dry. Let them sit in the colander for a minute or two so the steam escapes. For even better surface texture, shake the colander gently to scuff the edges.
- Dry thoroughly. Spread the potatoes on a tray or towel and let the surface moisture disappear completely before oiling.
- Use very little fat. Toss with just enough oil to lightly coat the surfaces, then season well with salt. A thin film browns better than a heavy slick.
- Heat the tray first. Put a heavy baking sheet in the oven while it preheats. When the potatoes go onto a hot surface, the bottom starts crisping right away.
The oven should be hot, around 220°C to 230°C. That higher heat helps the outside dehydrate and brown before the interior turns mushy. Spread the potatoes out in a single layer with space between them; crowding traps steam and gives you soft edges instead of a crust.
If you want a little extra crispness without adding much oil, use duck fat, beef drippings, or a small amount of ghee in place of part of the vegetable oil. These fats handle high heat well and help the surface brown more evenly. But even with plain oil, the method still works if the potatoes are dry and the tray is hot.
Turn the potatoes once halfway through roasting so two sides can color properly, but do not keep stirring them. Constant movement breaks the crust before it forms. In the last few minutes, leave them alone so the exterior can really set and turn crisp.
The result should be a potato that is fluffy inside, deeply golden outside, and crisp enough to hold its texture for a few minutes on the plate. If they come out pale or soft, the usual fix is simple: less moisture, more space, and a hotter start.
Try it with this recipe: https://en.alwaysyummy.recipes/cheesy-potato-and-broccoli-casserole-quick-oven-baked-dinner/