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Crispy Roasted Winter Squash & Potatoes with Fresh Rosemary
There’s a certain kind of magic that happens when winter squash and potatoes share a hot pan. The edges blister and bronze, the rosemary perfumes the kitchen, and suddenly what started as “just vegetables” becomes the centerpiece of the table. I developed this recipe on a blustery January evening when the fridge held little more than a knobby butternut, a handful of baby potatoes, and a sprig of rosemary that had somehow survived the holidays. One hour later my husband and I were standing at the counter, forks in hand, fighting over the crispy squash skins. We’ve made it weekly ever since—sometimes for a quiet Tuesday dinner, sometimes for a vegetarian Friends-giving, always with the same result: empty plates and happy sighs.
What I love most is its simplicity. No blanching, no par-boiling, no fancy gadgets—just a hot oven, good olive oil, and the patience to let the vegetables roast until they surrender their sugars and turn candy-sweet inside while staying shatter-crisp outside. Serve it straight off the pan with a lemony yogurt dollop, or pile it onto peppery arugula and call it dinner. Either way, keep the rosemary sprigs whole; they become brittle and fragrant, almost like herb crackers you can nibble alongside the squash.
Why This Recipe Works
- High-heat roasting: 425 °F guarantees deep caramelization without drying the interior.
- Staggered timing: Potatoes go in first so both vegetables finish together—no mushy squash.
- Cornstarch trick: A light dusting turns edges ultra-crispy without deep-frying.
- Fresh rosemary stems: They infuse the oil and become crispy themselves—zero waste.
- One-pan clean-up: Parchment equals lazy-evening dish duty.
- Vegan & gluten-free: Crowd-pleasing without labels.
Ingredients You'll Need
Butternut or honeynut squash – Look for specimens with matte, unblemished skin and a heavy heft; shiny skin signals under-ripeness. Honeynuts are smaller and sweeter, so if you find them, grab a few and reduce the roast time by 5 minutes. Peeled and cut into ¾-inch half-moons so every edge can crisp.
Baby (new) potatoes – Thin skins mean no peeling. Choose golf-ball-sized potatoes so they stay creamy inside while the squash browns. If you only have large Yukon Golds, quarter them and start them 10 minutes earlier.
Fresh rosemary – Woody stems hold up to heat; the needles turn into herb shards that stick to the vegetables. If fresh is out of reach, substitute 1 tablespoon finely minced sage, but trust me—spring for rosemary.
Extra-virgin olive oil – Use the good stuff; its fruity notes shine when roasted. Avoid “light” olive oil; you want the flavor.
Cornstarch – The secret weapon for restaurant-level crunch. Arrowroot works too, but cornstarch is cheaper and just as effective.
Smoked paprika & black pepper – Smoked paprika lends subtle campfire depth without overt spice. Freshly cracked pepper blooms in hot fat and perfumes everything.
Flaky sea salt – Finish with a snow shower of Maldon for pockets of crunch and pops of salinity.
How to Make Crispy Roasted Winter Squash & Potatoes with Fresh Rosemary
Heat the oven & prep the pan
Place a rimmed sheet pan in the oven and preheat to 425 °F (220 °C). A screaming-hot pan jump-starts browning. While it heats, line a second pan with parchment for easy cleanup later.
Cut & dry the vegetables
Peel squash with a Y-peeler, slice ¾-inch thick, and scoop seeds. Halve potatoes so they’re roughly the same size as squash pieces. Spread everything on a clean kitchen towel and blot vigorously; surface moisture is the enemy of crisp.
Season in layers
Toss potatoes with 1 tablespoon oil, ½ teaspoon cornstarch, ½ teaspoon salt, and a few cracks of pepper. Spread on the hot pan (careful—it may sizzle). Roast 12 minutes. Meanwhile, toss squash with remaining oil, cornstarch, salt, paprika, and rosemary leaves stripped from two stems.
Combine & roast
Flip potatoes, nestle squash among them, and scatter the naked rosemary stems across the tray. Return to oven 22–25 minutes, until squash edges are deeply browned and potatoes sound hollow when tapped.
Broil for extra crunch
Switch oven to high broil. Broil 2–3 minutes, watching like a hawk, until edges blister and rosemary stems crisp. Remove, discard woody stems, and finish with flaky salt.
Serve & swoon
Pile onto a platter, drizzle with lemon-tahini sauce or a spoonful of garlicky yogurt. Leftovers reheat like a dream in a cast-iron skillet for breakfast hash.
Expert Tips
Preheat the pan
A hot surface sears the bottoms instantly, preventing sticking and creating a potato “crust.”
Dry = crisp
Use a lint-free towel or paper towels; moisture will steam instead of roast.
Uniform size
Bite-size pieces roast evenly; aim for ¾-inch so centers stay creamy.
Don’t crowd
Use two pans if necessary; overlap causes steam and limp edges.
Save the stems
Crispy rosemary stems crumble like herb brittle—delicious over salads.
Reheat in skillet
Microwaves soften; a dry skillet revives crunch in 4 minutes.
Variations to Try
- Maple-chile: Swap smoked paprika for ½ tsp chipotle powder and drizzle 1 tablespoon maple syrup in the last 5 minutes.
- Lemon-garlic: Add thin lemon slices and unpeeled garlic cloves; squeeze the jammy cloves over everything at the table.
- Miso-butter: Whisk 1 tablespoon white miso with 1 tablespoon melted butter and toss through the vegetables post-roast.
- Autumn medley: Sub half the squash for acorn or delicata rings; leave the skin on for extra color and minerals.
- Protein boost: Add a can of drained chickpeas tossed with the same seasoning for a complete vegetarian meal.
Storage Tips
Refrigerate: Cool completely, then store in an airtight container up to 4 days. Reheat on a sheet pan at 400 °F for 8 minutes or in a skillet over medium heat.
Freeze: Spread cooled vegetables on a parchment-lined tray; freeze until solid, then transfer to zip bags up to 2 months. Reheat directly from frozen 12 minutes at 425 °F.
Make-ahead: Cube vegetables the night before; keep submerged in cold salted water to prevent browning. Drain and blot dry before roasting.
Frequently Asked Questions
Crispy Roasted Winter Squash & Potatoes with Fresh Rosemary
Ingredients
Instructions
- Preheat: Place sheet pan in oven and preheat to 425 °F (220 °C).
- Prep vegetables: Peel and slice squash ¾-inch thick; halve potatoes. Dry well.
- First roast: Toss potatoes with half the oil, cornstarch, salt, and pepper. Spread on hot pan; roast 12 minutes.
- Season squash: Toss squash with remaining oil, paprika, rosemary leaves, salt, and pepper.
- Combine: Flip potatoes, add squash and whole rosemary stems. Roast 22–25 minutes more.
- Broil: Broil 2–3 minutes until edges blister. Discard woody stems, finish with flaky salt, serve hot.
Recipe Notes
For extra crunch, dust vegetables with ½ teaspoon additional cornstarch before broiling. Leftovers keep 4 days refrigerated or 2 months frozen.
