Grilled Scalloped Potatoes [Easy BBQ Side Dish]

By Ben Isham-Smith


These grilled scalloped potatoes elevate the classic side dish by firing the potatoes on the grill. A guaranteed crowd-pleaser, these scalloped potatoes are tender, caramelized, and slightly smoky.

grilled scalloped potatoes cooked in cast iron skillet with wooden serving spoon

These grilled scalloped potatoes take creamy, buttery potatoes and add a whole extra twist by grilling them until tender and lightly smoked. The results are mouthwatering and make for the ultimate grilled side dish for any outdoor cook-off.

From potato prep to quick tips and tricks, discover how to make scalloped potatoes on the grill today. Let’s get cooking!

scalloped potatoes in cast iron skillet with slight crispy char and melted cheese

Scalloped Potatoes on the Grill

Scalloped potatoes are one of those dishes that potato fanatics love. After all, what’s better than thinly sliced potatoes baked in a creamy, buttery sauce along with perfectly caramelized onions? 

This recipe takes those same decadent, smooth, and rich scalloped potatoes and adds in one small twist. By grilling the scalloped potatoes, you get that same delicious flavor but with the added bonus of lightly smoked and slightly charred potatoes. The resulting dish is even more loaded with flavor and the perfect balance of textures. 

How to Make Grilled Scalloped Potatoes

  1. Prep Work: Preheat the grill to medium heat and grease a cast iron skillet with butter or cooking oil. Toss the sliced potatoes in the salt, pepper, and paprika.
  2. Layer the Skillet: Add sliced onions to the bottom of the skillet, followed by the potatoes. Spread them out evenly across the skillet. 
  3. Add the Butter and Milk: Spread the butter cubes evenly across the potatoes, then pour the milk over the top. 
  4. Cook: Cover the skillet with foil and cook for 45 minutes, then remove the foil lid and cook for 10 minutes or until the potatoes are fork-tender. Serve warm with chopped chives.


This grilled scalloped potatoes recipe takes a handful of common household ingredients and turns them into the perfect side dish. But, honestly, you probably have most of the ingredients you’ll need on hand already!

So, here’s exactly what you’ll need for these grilled scalloped potatoes:

  • Potatoes: Preferably red potatoes or Yukon gold, as they will hold up their shape better after being cooked 
  • Onion: Preferably yellow or white onion as they have a milder and more complimentary flavor
  • Milk: Either dairy or nondairy milk will work
  • Butter: Unsalted is best as it allows you to better control the amount of salt added
  • Salt and pepper: Adjusted to taste
  • Paprika: Adds a subtle layer of flavor, though it can be swapped for dried herbs or omitted
  • Chives: Optional, for garnish and pop of color

Ingredient Swaps and Suggestions

This recipe is great as is, but there is definitely room for some simple modifications to make it truly your own. Here are some of our recommendations:

  • Add cheese: This is actually how you make potatoes au gratin. Simply add 1 cup of shredded cheese (white cheddar, mozzarella, and gruyere are all great choices) to the potatoes after grilling for 45 minutes. 
  • Add garlic: Either minced or garlic paste will add tons of flavor. 3-4 cloves or ½ tablespoon of garlic paste should do the trick. 
  • Add fresh herbs: Swap the chopped chives for fresh basil or any other fresh herbs of your choice. 


This recipe for grilled scalloped potatoes makes four servings, making it the perfect side dish for your next barbecue dinner.

If you do end up with any leftovers, you can store them in an airtight container in the fridge. Stored this way, they should last up to 4-5 days. Or, if you want your grilled potatoes to last even longer, you can freeze them in an airtight container or freezer-safe bag and store them in the freezer for up to 3 months. 

To reheat your grilled scalloped potatoes, transfer them to a baking dish and heat in the oven at 350°F for 10-12 minutes or until the potatoes have fully warmed through.

Alternatively, you can microwave leftovers in a microwave-safe bowl in 30-second intervals until thoroughly warmed through.

If reheating from frozen, allow your potatoes to thaw overnight in the fridge before reheating.

Quick Tips 

  1. When it comes to potatoes, the waxier they are, the better they will hold up their shape after being cooked. Russet potatoes will work in a pinch, but they are more starchy and, therefore, will have a different texture after being grilled.
  2. Using a mandolin (like this one on Amazon) will help to thinly slice the potatoes and guarantee they are uniform in thickness. 
  3. If you don’t have a cast iron skillet, you can make a boat of aluminum foil instead. Simply lay out a sheet of foil wide enough for your potatoes, plus several extra inches. Then, roll up each end of the foil until you have a contained basket. Use a set of tongs to handle the foil once it gets placed on the grill. 
wooden spoon serving scalloped potatoes cooked in a cast iron skillet over grill fire
grilled scalloped potatoes

Grilled Scalloped Potatoes

5 from 2 votes
These grilled scalloped potatoes elevate the classic side dish by firing the potatoes on the grill. A guaranteed crowd-pleaser, these scalloped potatoes are tender, caramelized, and slightly smoky.
Print Recipe Pin Recipe
Prep Time10 minutes
Cook Time1 hour
Total Time1 hour 10 minutes
Course: Side Dish
Cuisine: American, French
Diet: Vegetarian
Servings: 4


  • 1 lb red potatoes thinly sliced
  • 1 small onion thinly sliced
  • ½ cup milk
  • 3 tbsp butter cubed
  • 1 tsp kosher salt or more to taste
  • 1 tsp black pepper
  • 2 tsp smoked paprika

Garnish (Optional)

  • ¼ cup chives chopped


  • Preheat the grill to medium heat, about 350°F (180°C), and grease a cast iron skillet with butter or cooking oil
  • In a large bowl, toss the sliced potatoes in salt, pepper, and paprika
  • Layer the sliced onions on the bottom of the skillet, followed by the seasoned potato slices. Spread the potatoes evenly across the skillet surface.
  • Pour the milk over the top of the potatoes and onion, then evenly sprinkle the butter cubes over the top of the potatoes
  • Cover the skillet with foil and place the skillet on the grill. Cook for 45 minutes.
  • Remove the foil cover and continue cooking the potato skillet until the potatoes are fork-tender, about 10 minutes
  • Remove skillet from grill. Garnish with chives and serve warm.


  1. Yukon gold potatoes will also work in place of red potatoes. Russet potatoes will also work, however they will change texture due to their comparatively high starch content.

About the Author

Ben Isham-Smith

A BBQ obsessive, Ben is behind 250+ of The Online Grill’s recipes, as well as countless barbecue guides to help barbecue newbies get to grips with the world’s best form of cooking.

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