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4.79 from 14 ratings

Perfect Grilled Onions Hack!

Make the most perfect grilled onions every single time with my amazing grilled onion hack! The perfect addition to so many meals!
Prep Time5 mins
Cook Time30 mins
Total Time35 mins
Course: Side Dish
Cuisine: American
Servings: 2 people
Calories: 236
Author: Natalie


  • 1 large yellow onion sliced
  • 2 tablespoons butter or ghee
  • 1 teaspoon kosher salt
  • water


  • Heat your cast iron skillet over medium heat.
  • Add the butter, onions and kosher salt. Cook stirring every few minutes.
    1 large yellow onion, 2 tablespoons butter or ghee, 1 teaspoon kosher salt
  • As soon as the onions start to look a little dry, add in a few tablespoons of water. This will both prevent the onions from drying out and keep them juicy and cooking at an even temperature. The water will evaporate as it cooks, leaving you with perfectly juicy onions. I usually add water twice during the cooking process.
  • Continue to grill the onions uncovered until they are soft and golden brown. About 30 minutes.
  • Serve warm or cold.
  • See the Recipe Notes below for more tips, FAQ's and recipe substitutions.


Onion: You can also use white or red onion.
Dairy Free/Vegan: If you need these to be dairy free, you can use coconut oil to grill onions in place of butter or ghee. 
Whole30: Use ghee or coconut oil to keep these Whole30 friendly.
Storing: Leftovers will keep in an airtight container refrigerated for at least 5 days, or frozen for at least 6 months. You can enjoy cold out of the fridge, or rewarm in the microwave or in the skillet.


Calories: 236 | Total Carbs: 7.5g | Protein: 1.1g | Fat: 23.1g | Fiber: 1.4g | Net Carbs: 6g