Cast Iron Roasted New Potatoes

By: Wyatt Martin on July 03, 2020

Roasted New Potatoes big green egg
Close Up of a Dog Photo

Wyatt Martin
Barbecue Eatin Expert

Roasted New Potatoes

This recipe is one of Chef Anthony Endy’s personal favorites. Cast Iron Roasted New Potatoes, with coal-roasted leeks, and sweet onion. Did I mention they are finished with jalapeno butter? This recipe is getting better by the minute. Although created on a Big Green Egg grill, you can recreate this recipe on any kamado or charcoal grill. Okay, it’s time to get your grill on.



  • 3 medium whole yellow onions
  • 4 whole leeks, cleaned
  • 2 tbsp. blended olive oil or canola oil
  • 4 lbs. new potatoes blanched tender in salted water
  • ¼ lb. jalapeño butter
    Salt and pepper to taste

Jalapeno Butter Ingredients

  • 3 garlic cloves
  • 2 fresh jalapeños, stemmed and seeds removed
  • 1 tsp salt
  • 3 tbsps. freshly squeezed lemon juice
  • 3 tbsp. minced cilantro leaves and stems
  • ½ tsp smoked paprika
  • ¼ lb. unsalted butter softened


Set the EGG for direct cooking with no grid at 400°F/204°C.

Place the leeks and onions directly on the coals and let them cook for 10-15 minutes until charred outside and tender inside (the time depends on the size of the onions).

With tongs, remove the leeks and onions from the coals. Lay on a sheet pan and let them cool. Peel the charred skin from the leeks and onions and discard the skins. Dice the tender onions and leeks.

Add the cooking grid, and place a Big Green Egg Cast Iron Skillet to the grid to heat. Add oil to the skillet and gently toss and sauté the potatoes for 3-4 minutes until seared and heated. Add the leeks, onions, and jalapeño butter and season with salt and pepper to taste.

Continue to cook the potatoes for an additional 4-5 minutes, simmering in the jalapeño butter and heating the potatoes through.

Jalapeño Butter Instructions

In a mortar and pestle or food processor, combine garlic, jalapeños, lemon juice, cilantro, and salt. Grind or process the ingredients together to make a paste. Add the mixture to the soft butter and add the paprika.