These grilled sweet potatoes soak up a smoky char that brings out their natural sweetness. A sprinkle of sea salt at the end makes them irresistible. Perfect alongside any summer barbecue or cozy fall dinner.
Introduction
I first tried grilled sweet potatoes at a summer cookout a few years ago, and I was instantly hooked. There’s something magical about how the grill transforms their natural sugars into this irresistible caramelized crust, giving each bite a smoky sweetness that’s hard to beat. Over time, I’ve tweaked this recipe to keep it simple but packed with flavor — just olive oil, sea salt, and fresh pepper, letting the sweet potatoes shine. The trick I learned is to slice them evenly and soak them briefly in water before grilling to remove excess starch, which helps them cook evenly without sticking or burning. When done right, the slices are tender on the inside with a slightly crisp, charred exterior. They make a fantastic side for any grilled meat or even as a snack with a cold drink. Honestly, once you try this, you’ll wonder why you ever boiled or roasted sweet potatoes the old-fashioned way!
What You'll Need
Approximately 8-10 slices per serving, 4 servings
- 2 large sweet potatoes, washed and sliced into 1/2-inch rounds
- 2 tablespoons olive oil
- 1 teaspoon sea salt, plus extra for finishing
- 1/2 teaspoon freshly ground black pepper
- Optional: fresh herbs for garnish (rosemary or thyme)
How To Do It
Step 1
Start by slicing your sweet potatoes into 1/2-inch thick rounds. Try to keep them as even as possible so they cook uniformly on the grill. Once sliced, soak them in cold water for about 10 minutes. This step helps to remove excess starch, preventing them from sticking to the grill and promoting a better caramelization later. After soaking, pat them dry thoroughly with a clean towel; any lingering moisture can cause steaming instead of grilling, which will affect texture.
⏱ Time: 15 minutes (including soaking)
✓ Doneness: Slices feel dry to the touch and are evenly cut
Step 2
Brush each sweet potato slice generously with olive oil on both sides. This not only prevents sticking but also encourages that beautiful golden crust to form when grilled. Sprinkle with sea salt and freshly ground black pepper for seasoning. Don’t rush this step; the oil and salt help with flavor and texture, so be thorough. If you skip oiling, the potatoes can stick and tear when flipping, ruining the presentation.
⏱ Time: 5 minutes
✓ Doneness: Slices are evenly coated and lightly glistening
Step 3
Preheat your grill to medium-high heat, about 400°F (200°C). A hot grill is crucial for good searing and caramelization without drying out the potatoes. Clean and oil the grill grates to avoid sticking. If using a charcoal grill, let the coals burn down until covered with white ash for steady heat. For gas grills, preheat for at least 10 minutes.
⏱ Time: 10 minutes
✓ Doneness: Grill grates are hot and clean, visible heat waves rising
Step 4
Place the sweet potato slices directly on the grill grates. Don’t overcrowd them; leave space so the heat circulates evenly. Let them cook undisturbed for about 5-7 minutes. This is key — flipping too early or too often prevents the caramelized crust from forming. You want to see nice grill marks and feel the slice release easily from the grate before flipping.
⏱ Time: 7 minutes
✓ Doneness: Visible char marks and slices lift easily off the grill
Step 5
Flip the slices carefully using tongs, then grill the other side for another 5-7 minutes. The goal is to get a tender inside while maintaining a slight crisp on the outside. If your grill is too hot, the outside will burn before the inside cooks through, so adjust heat as needed. Avoid pressing down on the slices as this squeezes out moisture and dries them out.
⏱ Time: 7 minutes
✓ Doneness: Slices are tender when pierced with a fork but hold shape
Step 6
Once grilled, transfer the sweet potatoes to a serving plate immediately. While still hot, sprinkle a little more sea salt on top to enhance the natural sweetness and add a subtle crunch. Adding salt at the end preserves its texture and flavor punch. If desired, garnish with fresh herbs like rosemary or thyme for an earthy aroma and a pop of color.
⏱ Time: 5 minutes
✓ Doneness: Salt crystals visible and herbs fresh and vibrant
Step 7
Serve your smoky grilled sweet potatoes hot off the grill. They pair beautifully with grilled meats, fish, or even a fresh salad. If you’re making ahead, let them cool completely before storing in an airtight container. Reheat briefly on the grill or in a hot oven to bring back that lovely char and warmth without drying them out.
⏱ Time: Immediate serving or storage
✓ Doneness: Warm, tender slices with a slight crisp exterior
Step 8
For an extra flavor twist, try brushing the slices with a mix of olive oil and a dash of smoked paprika before grilling. This adds a subtle smoky depth that complements the natural sweetness. Just be careful not to add too much spice, which can overpower the delicate flavor.
⏱ Time: Optional prep, 5 minutes
✓ Doneness: Slices have a reddish tint and smoky aroma before grilling
Step 9
If you want to keep these vegan-friendly but add some richness, drizzle a little tahini or your favorite nut butter right before serving. It melts slightly on the warm potatoes, adding a creamy texture that contrasts nicely with the crisp edges.
⏱ Time: Optional finishing, 2 minutes
✓ Doneness: Creamy drizzle melts into potatoes without overpowering
Variations
Spicy Chipotle Grilled Sweet Potatoes
Add a smoky heat by mixing olive oil with chipotle powder before brushing on the sweet potatoes. This variation has a deep, spicy kick that complements the natural sweetness beautifully.
Note: Spicy powders can burn quickly; apply a thin coat and watch the grill carefully to prevent charring.
Herb and Garlic Butter Glaze
After grilling, brush slices with melted butter infused with minced garlic and fresh herbs. It adds richness and a fragrant finish, perfect for a more indulgent side dish.
Note: Apply glaze off the heat to avoid burning the garlic and herbs.
Maple Cinnamon Sweet Potatoes
Drizzle warm maple syrup and a pinch of cinnamon over the grilled slices for a sweet, cozy flavor twist. Great for brunch or dessert.
Note: Add syrup just before serving to keep the texture crisp.
Vegan Tahini Drizzle
Top grilled sweet potatoes with a simple tahini sauce mixed with lemon juice and garlic. This adds a creamy, nutty layer that pairs well with the smoky sweetness.
Note: Serve immediately after drizzling to avoid sogginess.
Grilled Sweet Potato Salad
Chop grilled sweet potatoes and toss with arugula, toasted nuts, feta, and a lemon vinaigrette for a hearty salad. It’s a great way to turn leftovers into a fresh meal.
Note: Cool potatoes completely before chopping to keep salad texture intact.
Pro Tips
Soak sweet potato slices in cold water before grilling.
Soaking removes excess surface starch, which prevents sticking and promotes even cooking. It also helps achieve a tender texture inside without becoming mushy or gummy.
Use medium-high heat for grilling to get perfect caramelization.
Too low heat won’t brown the potatoes properly, while too high heat risks burning the exterior before the inside cooks. Medium-high heat ensures a crispy crust and tender interior.
Don’t flip the slices too often while grilling.
Flipping too frequently disrupts the caramelization process and can tear the slices. Letting one side cook undisturbed forms a nice crust and grill marks.
Brush olive oil evenly on both sides before grilling.
Oil prevents sticking and helps conduct heat, promoting even browning and a crisp texture. Skipping this step often leads to torn slices stuck to the grill.
Add sea salt right after grilling, not before.
Salt draws moisture out of the potatoes, so adding it too early can make the slices soggy. Sprinkling after grilling preserves texture and adds a pleasant crunch.
Use tongs to flip gently to keep slices intact.
Sweet potato slices can be delicate when warm. Using tongs carefully avoids breaking or tearing, ensuring an attractive presentation.
Let grilled sweet potatoes rest for a few minutes before serving.
Resting allows residual heat to finish cooking the inside while the exterior firms up slightly, enhancing texture and flavor.
Common Mistakes to Avoid
Cutting uneven slices
Why it happens Many cooks underestimate how important uniform thickness is for even cooking and caramelization.
Fix Use a sharp knife and a steady hand to slice sweet potatoes about 1/2 inch thick. If slices vary, thinner parts will burn while thicker parts remain undercooked.
Skipping the soaking step
Why it happens People often want to save time and think soaking is unnecessary.
Fix Don’t skip soaking. It removes starch that can cause sticking and gummy texture. Soak for at least 10 minutes and pat dry thoroughly before grilling.
Grilling on too low heat
Why it happens Beginners may fear burning and lower the heat too much.
Fix Preheat grill to medium-high (around 400°F). This temperature is ideal for caramelization without burning. Adjust if slices cook too fast or slow.
Flipping too often
Why it happens Some think flipping frequently prevents burning or promotes even cooking.
Fix Flip only once after grill marks develop, about 5-7 minutes. This ensures a nice crust and helps slices cook evenly.
Applying salt too early
Why it happens Many season before cooking to enhance flavor.
Fix Add salt after grilling to avoid drawing moisture out prematurely, which can make slices soggy.
Nutrition
Per Serving:
Nutritional values are estimates and may vary based on specific ingredients used.
Storage & Tips
Room Temperature
Grilled sweet potatoes can safely be kept at room temperature for up to 2 hours if covered loosely to prevent drying. Avoid leaving out longer to reduce risk of bacterial growth.
Refrigerator
Store cooled grilled sweet potatoes in an airtight container for up to 4 days. The texture may firm up slightly when cold. Reheat gently to restore softness and flavor.
Freezer
Freeze grilled sweet potato slices in a single layer on a baking sheet, then transfer to a freezer bag for up to 3 months. Wrap tightly to prevent freezer burn. Thaw overnight in the fridge before reheating.
Reheating
Reheat on a grill or in a 350°F oven for 5-10 minutes to revive crispness. Avoid microwaving as it can make them soggy. Add a light brush of oil or butter before reheating for moisture.
Make Ahead
You can slice and soak the sweet potatoes 1 day ahead, storing them in water in the fridge to prevent browning. Brush with oil and season just before grilling for best results.
FAQ
Can I use a grill pan instead of an outdoor grill?
Absolutely! A grill pan on the stovetop can mimic the grill marks and smoky flavor if you don’t have an outdoor grill. Preheat the pan well and brush with oil to prevent sticking. Cook in batches to avoid overcrowding.
What if my sweet potato slices fall apart on the grill?
This usually happens if slices are too thin or not oiled enough. Make sure slices are about 1/2 inch thick and brush both sides generously with oil. Use tongs gently to flip and avoid pressing down.
Can I prepare these sweet potatoes ahead of time?
Yes! You can slice and soak the potatoes up to a day ahead, keeping them submerged in water in the fridge. Just pat dry and season right before grilling to maintain texture and flavor.
How do I make this recipe vegan?
This recipe is naturally vegan as written, using olive oil and no animal products. Avoid adding butter or other dairy toppings unless you want to customize it.
What’s the best way to reheat leftovers without drying them out?
Reheat on a grill or in an oven at 350°F with a light brush of oil to keep the slices moist and crisp. Avoid microwaving as it tends to make them soggy and rubbery.
Can I add other spices or herbs before grilling?
Yes! Paprika, cumin, or fresh herbs like rosemary work well. Just be cautious with delicate herbs; add them after grilling to prevent burning.
Why is soaking the sweet potatoes necessary?
Soaking removes excess starch which can cause sticking and uneven cooking. It also helps achieve a tender interior and a nice crisp exterior when grilled.
Can I use regular potatoes instead?
You can, but grilling sweet potatoes brings out their unique sweetness and texture. Regular potatoes may require longer cooking times and won’t caramelize the same way.
Final Thoughts
I hope you enjoy making these smoky grilled sweet potatoes as much as I do! Don’t forget to share your results and any tweaks you try — I love hearing from you.
