Ingredients
Method
Step 1: Boil the Potatoes
Place an oven rack in the middle position and heat the oven to 450°F (230°C), or 400°F (200°C) if you’re using a convection setting. Fill a large pot with about 2 quarts of water and bring it to a rolling boil. Add the kosher salt and baking soda, then carefully add the peeled potato chunks. Stir once so everything is evenly submerged. Return the pot to a boil, then lower the heat to maintain a gentle simmer. Cook the potatoes until they become tender and a knife slides in easily, usually around 10 minutes after the water returns to a boil.
Step 2: Prepare the Herb-Infused Oil
While the potatoes simmer, combine the oil or fat with the chopped rosemary and minced garlic in a small saucepan. Add a few grinds of black pepper. Warm the mixture over medium heat, gently stirring until the garlic begins to turn lightly golden and fragrant. This usually takes about 3 minutes. Strain the oil through a fine sieve into a large mixing bowl, saving the garlic and rosemary solids separately. Straining immediately prevents the garlic from overcooking and developing bitterness.
Step 3: Coat and Rough Up the Potatoes
Once the potatoes are tender, drain them well. Let them sit in the hot pot for about 30 seconds so the steam can evaporate any excess moisture. Transfer the potatoes into the bowl with the flavored oil. Season with salt and pepper if needed. Toss the potatoes vigorously until the surfaces become slightly rough and coated with a light mashed-potato texture. Those uneven edges are key—they create the crispy exterior during roasting.
Step 4: Roast Until Crispy
Spread the potatoes evenly across a large rimmed baking sheet. Make sure they sit in a single layer with space between each piece. Place the tray in the hot oven and roast for 20 minutes without disturbing them. This helps develop the initial crust. After 20 minutes, use a spatula to gently loosen any stuck pieces and flip the potatoes. Continue roasting, turning them occasionally, for another 30–40 minutes, until they become deeply golden and crisp on all sides.
Step 5: Finish and Serve
Transfer the hot roasted potatoes to a serving bowl. Add the reserved garlic and rosemary mixture along with the chopped parsley. Toss everything together until evenly coated. Taste and adjust seasoning with salt and pepper if needed. Serve immediately while they’re hot, crunchy, and fresh from the oven.
Notes
Ingredient Substitutions
This recipe is flexible and works well with a few simple swaps. Potatoes: Russet potatoes give a fluffy interior, while Yukon Golds hold their shape beautifully. Red potatoes can work, but they won’t develop quite the same crisp edges. Baking soda: This ingredient helps break down the outer surface of the potatoes, creating rough edges that crisp up during roasting. Skipping it will still produce good potatoes, but they won’t be quite as crunchy. Cooking fat: Duck fat, goose fat, or beef fat add rich flavor and extra crispiness. Olive oil is a great everyday option. Avocado oil or melted butter mixed with neutral oil also works well. Herbs: Rosemary is classic, but thyme or sage can be used instead. If using dried herbs, add them during the last part of roasting so they don’t burn. Fresh herbs for finishing: Parsley adds color and freshness, but chopped chives, green onions, or dill also make excellent garnishes.Common Mistakes to Avoid
One of the most important steps in making perfect roast potatoes is parboiling them first. Boiling softens the inside while roughening the surface so it crisps beautifully in the oven. Be sure to cook the potatoes until just tender—usually 10–15 minutes depending on size. The edges should look slightly fluffy. Adding baking soda to the boiling water helps break down the potato surface, which improves crispiness later. After draining, let the potatoes sit briefly so excess moisture evaporates. Another key factor is oven temperature. The oven must be very hot—around 425–450°F—to achieve a deep golden crust. Also avoid constantly moving the potatoes while roasting. Let them sit long enough to develop that crispy exterior before flipping.What to Serve With Roast Potatoes
These crispy potatoes pair beautifully with nearly any roasted meat. They’re especially great alongside roast chicken, beef, lamb, or pork, where they can soak up flavorful pan juices. Add roasted vegetables like carrots, Brussels sprouts, or green beans to complete the meal. A fresh salad also works nicely to balance the richness. For a cozy Sunday dinner, serve them with gravy and your favorite roast for a meal that feels comforting and satisfying.Storage Instructions
Refrigerate
Store leftover roast potatoes in an airtight container in the refrigerator for up to 4 days. They may lose a bit of their crispness but still taste delicious.Freeze
Allow the potatoes to cool completely, then freeze them in a single layer on a baking sheet. Once frozen, transfer them to freezer bags and store for up to 3 months.Reheat
To restore their crisp texture, reheat them in a 400°F oven for 10–15 minutes. An air fryer also works wonderfully—heat at 375°F for 5–8 minutes until crispy again.Frequently Asked Questions
Why add baking soda to the boiling water?
Baking soda slightly breaks down the potato surface. This creates rough edges that crisp up beautifully when roasted.Which potatoes work best for roasting?
Russet and Yukon Gold potatoes are the best options. Russets become fluffy inside, while Yukon Golds stay creamy and hold their shape.Can I prepare the potatoes ahead of time?
Yes. You can parboil the potatoes earlier in the day, then roast them just before serving for maximum crispiness.Why aren’t my roast potatoes crispy?
This usually happens if the oven isn’t hot enough, the potatoes are crowded on the pan, or they weren’t parboiled long enough.Can I use different herbs?
Absolutely. Rosemary, thyme, sage, or even oregano can all work well depending on the flavor you prefer.Final Thoughts
Perfect roast potatoes don’t require complicated techniques—just a few smart steps and the right timing. Parboiling the potatoes, roughing up the edges, and roasting them in a hot oven creates that ideal combination of crispy golden crust and fluffy interior. Whether you’re preparing a casual weeknight dinner or a full holiday spread, these potatoes are a reliable and crowd-pleasing side dish. Once you master the method, you’ll have a go-to recipe that delivers perfectly crispy roast potatoes every time.