Ingredients
Equipment
Method
Step 1 - Prep the Potatoes
- Scrub potatoes clean but leave skins on. Cut larger potatoes into quarters or thick wedges; cut smaller ones in half. Aim for pieces that are 1 to 1.5 inches thick for even cooking and to prevent them from falling through grill grates.
Step 2 - The Alkaline Parboil
- Bring 3 quarts of water to a full rolling boil in a large pot. Add kosher salt and baking soda, stirring to dissolve completely. The baking soda raises the pH of the water, creating an alkaline environment that breaks down surface pectin and creates the foundation for extra crispiness.
Step 3 - Parboil the Potatoes
- Add potato pieces to the boiling water. Boil for 8-10 minutes until just fork-tender—cooked about 80% through but still holding their shape. Do not overcook or they will fall apart on the grill. Test by inserting a fork into the thickest piece; it should go in with slight resistance.
Step 4 - The Steam-Dry Shake
- Drain potatoes in a colander and let them sit for 2-3 minutes to release steam and dry slightly. Return the drained potatoes to the empty pot. Place the lid on and shake the pot vigorously for 10-15 seconds. This roughens up the edges and creates a starchy coating that crisps beautifully on the grill.
Step 5 - Season the Potatoes
- Transfer roughed-up potatoes to a large mixing bowl. Drizzle with olive oil. Add garlic powder, dried rosemary, dried thyme, black pepper, and kosher salt. Toss gently but thoroughly until every piece is evenly coated. Note: Use garlic powder here, not fresh garlic, to prevent burning on the high-heat grill.
Step 6 - Preheat the Grill
- Preheat your grill to 400-450°F. For charcoal, let coals burn until covered in white ash. For gas, turn all burners to high and close the lid for 10 minutes. Lightly oil the grill grates using a paper towel dipped in oil and held with tongs to prevent sticking.
Step 7 - Grill the Potatoes (First Side)
- Arrange potato pieces on the grill in a single layer, cut-side down. Leave at least ½ inch of space between pieces—do not crowd. Close the grill lid and cook for 3-4 minutes without moving them. Potatoes will release naturally from grates once a crust has formed.
Step 8 - Flip and Continue Grilling
- Using tongs, flip each piece to the other cut side. Close the lid and grill for another 3-4 minutes until deep golden-brown with visible char marks. For extra crispness, flip to a third side (skin side) and grill for 2-3 minutes more. Total grill time: 10-12 minutes.
Step 9 - Prepare the Garlic Herb Butter
- While potatoes finish grilling, melt butter in a small saucepan or microwave-safe bowl. Add minced fresh garlic and let sit off the heat for 1-2 minutes. The residual warmth softens the garlic without burning it.
Step 10 - The Post-Grill Toss
- Transfer grilled potatoes to a large serving bowl. Pour garlic butter over the top, then add fresh chopped parsley. Toss gently to coat. Taste and adjust seasoning with more salt if needed. Add red pepper flakes for heat or Parmesan for savory umami. Serve immediately while hot and crispy.
Notes
The Baking Soda Secret:
Adding ½ teaspoon of baking soda to the parboiling water is the game-changer. It creates an alkaline environment that breaks down the pectin on the potato surface, allowing the edges to roughen up dramatically during the shake step. This starchy, rough surface crisps into a shatteringly crunchy crust on the grill—tripling the crunch compared to potatoes parboiled in plain water. Why Garlic Powder During Grilling:
Fresh garlic burns at temperatures above 350°F, turning black and bitter in seconds. Since the grill runs at 400-450°F, using garlic powder (which is dehydrated and heat-stable) prevents burning. Fresh minced garlic is added after grilling in warm butter for maximum flavor without bitterness. The Steam-Dry Shake:
This step is crucial. Roughing up the parboiled potato edges creates exponentially more surface area. Those fuzzy, starchy ridges crisp up into golden, crunchy peaks on the grill. Don't skip this step. Don't Flip Too Early:
Wait until the potatoes release naturally from the grates (3-4 minutes). If you try to flip them sooner, they will stick and tear, and you'll lose the crust. Potato Variety Matters:
Russet potatoes have the highest starch content (18-22%), creating the fluffiest interior and thickest crust. Yukon Gold potatoes offer a creamier, more buttery texture with slightly less dramatic crispness. Avoid waxy red potatoes—they won't crisp properly. Oven Method Alternative:
No grill? Preheat oven to 450°F with a baking sheet inside. After parboiling and seasoning, spread potatoes on the hot sheet in a single layer. Roast for 25-30 minutes, flipping halfway through. You'll get excellent crispness without the smoky char. Make-Ahead Tip:
You can parboil potatoes up to 4 hours ahead. After the steam-dry shake, spread them on a baking sheet and refrigerate uncovered. When ready to grill, toss in oil and seasonings and proceed as directed. Scaling:
This recipe doubles easily for larger crowds. Just work in batches on the grill to avoid crowding. Herb Variations:
Try sage, oregano, or marjoram. For Southwestern flavor, use cumin and smoked paprika. For Mediterranean, add lemon zest and oregano. Sweet Potato Version:
Sweet potatoes work but need shorter parboil time (5-6 minutes) and will caramelize faster due to higher sugar content. Watch them closely.
Adding ½ teaspoon of baking soda to the parboiling water is the game-changer. It creates an alkaline environment that breaks down the pectin on the potato surface, allowing the edges to roughen up dramatically during the shake step. This starchy, rough surface crisps into a shatteringly crunchy crust on the grill—tripling the crunch compared to potatoes parboiled in plain water. Why Garlic Powder During Grilling:
Fresh garlic burns at temperatures above 350°F, turning black and bitter in seconds. Since the grill runs at 400-450°F, using garlic powder (which is dehydrated and heat-stable) prevents burning. Fresh minced garlic is added after grilling in warm butter for maximum flavor without bitterness. The Steam-Dry Shake:
This step is crucial. Roughing up the parboiled potato edges creates exponentially more surface area. Those fuzzy, starchy ridges crisp up into golden, crunchy peaks on the grill. Don't skip this step. Don't Flip Too Early:
Wait until the potatoes release naturally from the grates (3-4 minutes). If you try to flip them sooner, they will stick and tear, and you'll lose the crust. Potato Variety Matters:
Russet potatoes have the highest starch content (18-22%), creating the fluffiest interior and thickest crust. Yukon Gold potatoes offer a creamier, more buttery texture with slightly less dramatic crispness. Avoid waxy red potatoes—they won't crisp properly. Oven Method Alternative:
No grill? Preheat oven to 450°F with a baking sheet inside. After parboiling and seasoning, spread potatoes on the hot sheet in a single layer. Roast for 25-30 minutes, flipping halfway through. You'll get excellent crispness without the smoky char. Make-Ahead Tip:
You can parboil potatoes up to 4 hours ahead. After the steam-dry shake, spread them on a baking sheet and refrigerate uncovered. When ready to grill, toss in oil and seasonings and proceed as directed. Scaling:
This recipe doubles easily for larger crowds. Just work in batches on the grill to avoid crowding. Herb Variations:
Try sage, oregano, or marjoram. For Southwestern flavor, use cumin and smoked paprika. For Mediterranean, add lemon zest and oregano. Sweet Potato Version:
Sweet potatoes work but need shorter parboil time (5-6 minutes) and will caramelize faster due to higher sugar content. Watch them closely.