Love this? Pin it for later!
Why This Recipe Works
- Double-cooking magic: A quick boil plus a hot roast guarantees creamy insides and chip-crisp outsides.
- Flavor-packed infusion: Garlic-rosemary oil is brushed on at three separate stages for layered aroma.
- One-pan ease: Everything roasts on a single sheet pan—minimal cleanup, maximum caramelization.
- Vegetarian main-course worthy: Add a herby yogurt drizzle and roasted chickpeas for a complete meatless meal.
- Make-ahead friendly: Boil and smash the night before; finish in 15 minutes while your guests arrive.
- Holiday show-stopper: Easter lamb, Thanksgiving turkey, or weeknight chicken—this side steals the spotlight.
Ingredients You'll Need
Great smashed potatoes start with the right spud. Look for baby (or new) potatoes that are 1½–2 inches across—large enough to smash without falling apart, small enough to cook quickly. I reach for a colorful medley of red, yellow, and purple varieties for visual pop; the thin skins blister beautifully and add fiber.
Rosemary should be fresh, not dried; its pine-like perfume is the soul of this dish. Strip the needles off woody stems and mince finely so they crisp rather than burn. Out of season? Swap fresh thyme or sage, but reduce the quantity by half—their oils are more potent.
For the garlic, buy firm, tight heads. We're using six cloves, micro-planed into a paste so it melds with the olive oil and doesn't scorch. If you're sensitive to pungency, blanch the cloves for 30 seconds before mining to tame the bite.
Olive oil matters: choose a buttery, fruit-forward extra-virgin variety from California or Portugal. You'll need enough to coat the potatoes liberally—it's the key to glass-shatter crusts.
Finally, keep a flaky sea salt like Maldon on hand for finishing. Its delicate crunch amplifies the rosemary and adds tiny saline sparks in every bite.
How to Make Crispy Smashed Potatoes with Rosemary and Garlic
Preheat & prep pan
Position rack in lower-middle of oven; heat to 450 °F (230 °C). Drizzle 2 Tbsp olive oil onto a rimmed half-sheet pan; place in the hot oven so the oil shimmers—this jump-starts crisping.
Boil potatoes
Scrub 2 lb baby potatoes; place in a large saucepan. Cover with cold, well-salted water by 1 inch. Bring to a boil, reduce to a lively simmer, and cook 12–15 min until a paring knife slides through with gentle resistance. Drain; let steam-dry 2 min—dry skins = better crunch.
Create flavored oil
While potatoes boil, combine ⅓ cup olive oil, 2 tsp minced fresh rosemary, 2 grated garlic cloves, ½ tsp kosher salt, and a few cracks of black pepper in a small jar. Shake; set aside 5 min to infuse.
Smash!
Transfer potatoes to a clean kitchen towel; pat dry. Place on the preheated oiled pan, leaving 2 in between. Use the bottom of a sturdy drinking glass or a measuring cup to press each potato to ½-inch thickness. Twist slightly to create ragged edges—these lacy bits are the crunch zones.
First brush & roast
Brush half of the rosemary-garlic oil over smashed potatoes. Roast 20 min until bottoms are deep golden.
Flip & second brush
Use a thin metal spatula to flip potatoes—don't worry if some break; more surface area = more crunch. Brush with remaining oil, sprinkle with ¼ tsp flaky salt, and roast another 12–15 min until both sides are mahogany and edges are frizzled.
Final aromatics
While potatoes finish, warm 1 Tbsp butter with remaining grated garlic clove and a pinch of rosemary in a small skillet 30 sec until fragrant. Drizzle over hot potatoes, toss gently, and finish with a shower of flaky salt.
Expert Tips
Hot oil = non-stick insurance
Let the sheet pan heat inside the oven before adding potatoes. The sizzle on contact prevents sticking and jump-starts browning.
Don't crowd
Use two pans rather than overlapping potatoes. Steam is the enemy of crisp; give each spud personal space.
Par-cook the night before
Boil, drain, and refrigerate potatoes on a parchment-lined tray. Next evening, smash and roast for 15 min—perfect for dinner parties.
Freeze the oil for speed
Mix a double batch of rosemary-garlic oil and freeze in ice-cube trays. Pop a cube onto hot potatoes straight from the freezer—zero wait time.
Color equals flavor
Mix red, yellow, and purple baby potatoes. Each variety caramelizes differently, giving you a mosaic of textures and subtly varied sweetness.
Finish with acid
A quick squeeze of lemon or a splash of sherry vinegar right out of the oven brightens the rich oil and balances the dish.
Variations to Try
-
Lemon-Parmesan
Swap rosemary for 1 tsp lemon zest and 1 Tbsp chopped parsley. Finish with ¼ cup shaved Parm and cracked pepper.
-
Smoky Paprika & Thyme
Add ½ tsp smoked paprika and 1 tsp fresh thyme leaves to the oil. Serve with garlicky aioli for dipping.
-
Spicy Harissa
Whisk 1 tsp harissa paste into the oil. Sprinkle with toasted sesame seeds and cilantro for North-African flair.
-
Loaded Main-Dish
Top hot potatoes with roasted broccoli, a fried egg, and everything-bagel seasoning for a speedy vegetarian dinner.
-
Sweet Potato Twist
Substitute orange sweet potatoes; boil 8 min only. Season with maple-garlic butter and pecans for autumn vibes.
Storage Tips
Refrigerate: Cool potatoes completely, then store in an airtight container up to 4 days. Reheat on a sheet pan at 425 °F for 8–10 min to restore crispness—microwaves turn them rubbery.
Freeze: Freeze roasted potatoes in a single layer on a tray, then transfer to a freezer bag up to 2 months. Bake from frozen 12–15 min; texture will be slightly less shatter-crisp but still delicious.
Make-ahead components: Boil and smash potatoes up to 24 hours ahead; keep uncovered on a parchment-lined tray in the fridge so skins stay dry. Roast just before serving.
Frequently Asked Questions
Crispy Smashed Potatoes with Rosemary and Garlic
Ingredients
Instructions
- Preheat: Heat oven to 450 °F. Pour 2 Tbsp olive oil onto rimmed sheet pan; place in oven to heat.
- Boil: Simmer potatoes in salted water 12–15 min until just tender. Drain; steam-dry 2 min.
- Flavor oil: Shake remaining oil, rosemary, half the garlic, salt, and pepper in a jar.
- Smash: Place hot potatoes on preheated oiled pan; smash to ½-inch thick with bottom of glass.
- Roast: Brush with half the flavored oil; roast 20 min. Flip, brush again, roast 12–15 min more.
- Finish: Warm butter with remaining garlic 30 sec; drizzle over potatoes, toss, sprinkle with flaky salt. Serve hot.
Recipe Notes
For a vegetarian main, top with garlicky Greek yogurt, roasted chickpeas, and quick-pickled red onions. Potatoes can be boiled and smashed up to 24 hours ahead; keep uncovered in the fridge for maximum skin-dryness and crisp potential.
