Crispy Roast Potatoes with Rosemary and Garlic – Whole30

Why You’ll Love This Recipe

I appreciate how this recipe delivers exceptionally crispy potatoes without complicated techniques. Boiling the potatoes with baking soda helps create rough edges that become wonderfully crunchy during roasting. The roasted garlic adds a rich, mellow flavor, while fresh rosemary brings an aromatic finish. I also enjoy that the recipe is naturally dairy-free when made with duck fat or olive oil and fits perfectly into Whole30 meal plans.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

• 4 pounds yellow potatoes, peeled and cut into large chunks
• 2 tablespoons kosher salt, plus extra to taste
• 1/2 teaspoon baking soda
• 1/4 cup duck fat (or olive oil, beef tallow, ghee, or avocado oil)
• 1/4 teaspoon freshly cracked black pepper
• 1 whole head garlic, top trimmed
• 1 tablespoon finely chopped fresh rosemary
• 1 tablespoon extra-virgin olive oil (or grass-fed butter if not following Whole30)
• 1/4 teaspoon flaky sea salt, for finishing

Directions

1. I place a large empty roasting pan in the oven and preheat the oven to 450°F (230°C).
2. I rinse the potatoes under cold water to remove excess starch and place them in a large stockpot.
3. I cover the potatoes with cold water, add the kosher salt and baking soda, and bring everything to a boil over high heat.
4. I cook the potatoes until they are just fork-tender and the edges begin to flake, about 25 minutes.
5. I drain the potatoes and allow them to dry completely in the colander.
6. I carefully remove the hot roasting pan from the oven, add the duck fat, and let it melt.
7. I gently shake the potatoes in the colander to rough up their surfaces.
8. I transfer the potatoes to the roasting pan, season with a pinch of salt and black pepper, and toss to coat.
9. I place the garlic head cut-side down among the potatoes.
10. I roast for 55 to 60 minutes, tossing the potatoes every 20 minutes, until they are deeply golden brown and crispy.
11. I remove the roasted garlic and squeeze the softened cloves into a bowl.
12. I combine the garlic cloves with the chopped rosemary and olive oil, then mash everything together with a fork.
13. I add the garlic-rosemary mixture to the potatoes and toss until evenly coated.
14. I return the pan to the oven for an additional 5 minutes until the rosemary becomes fragrant and the garlic is lightly toasted.
15. I taste for seasoning, add flaky sea salt if desired, and serve immediately.

Servings and Timing

• Servings: 6
• Prep Time: 10 minutes
• Cooking Time: 1 hour 25 minutes
• Total Time: 1 hour 35 minutes

Variations

I sometimes replace the rosemary with fresh thyme or sage for a different herbal flavor. When I want extra richness, I use beef tallow or ghee instead of duck fat. For a slightly spicy variation, I add a pinch of crushed red pepper flakes before roasting. I also enjoy sprinkling fresh parsley over the finished potatoes for added color and freshness.

Storage/Reheating

I store leftover potatoes in an airtight container in the refrigerator for up to 4 days. To restore their crispiness, I reheat them in a 425°F (220°C) oven for about 10 to 15 minutes or in an air fryer for 5 to 7 minutes. While the microwave can be used for convenience, I find that it softens the crispy exterior. I do not typically freeze these potatoes because the texture changes after thawing.

FAQs

Why do I add baking soda to the boiling water?

I use baking soda because it helps break down the outer layer of the potatoes. This creates rough edges that become exceptionally crispy during roasting.

Can I use a different type of potato?

Yes, I can use Yukon Gold, yellow potatoes, or even russet potatoes. Each variety produces slightly different textures, but all work well.

Why should I preheat the roasting pan?

I preheat the roasting pan because it helps the potatoes begin crisping immediately when they hit the hot fat, creating a better crust.

Can I make these potatoes without duck fat?

Absolutely. I can substitute olive oil, avocado oil, beef tallow, or ghee depending on my dietary preferences and what I have available.

How do I know when the potatoes are done?

I look for a deep golden-brown color and a crispy exterior. The inside should remain soft and fluffy when pierced with a fork.

Conclusion

I find these Crispy Roast Potatoes with Rosemary and Garlic to be one of the most satisfying side dishes I can make. The combination of crunchy edges, fluffy centers, roasted garlic, and fragrant rosemary creates incredible flavor in every bite. Whether I serve them for a holiday gathering, a family dinner, or a special weekend meal, they always disappear quickly from the table.