Caramelized Onions are a kitchen staple that bring out the natural sweetness of onions through slow cooking. They add incredible depth of flavor to soups, burgers, sandwiches, and pasta dishes.
This recipe is simple, budget friendly, and one you'll want to keep on hand. I often use these onions in my Caramelized Onion Grilled Cheese Sandwich recipe or to top a juicy burger for extra flavor.
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Why You'll Love This Caramelized Onions Recipe
Sweet depth: slowly cooking onions brings out their natural sugars and creates a rich, sweet taste.
Versatile topping: use them on burgers, pizza, pasta, or stirred into dips for a flavor boost.
Make ahead: store them in the fridge and enjoy throughout the week.
Key Ingredients for Caramelized Onions
See the recipe card at the end of this post for a full list of ingredients and instructions.
- Onions: yellow onions are classic for caramelizing because of their natural sweetness.
- Olive oil and butter: a mix of both gives flavor and prevents sticking.
- Brown sugar: optional, but it enhances the sweetness and deepens the golden color.
- Salt and pepper: balances and brings out the flavors.
Ingredient Substitutions
- Red onions: use for a slightly sharper, bolder taste.
- Ghee: swap for butter if you want a richer, nutty flavor.
- Balsamic vinegar or red wine: add a splash in place of brown sugar for a tangy sweetness.
- Honey swap: use honey in place of brown sugar.
- Make this low carb: leave out the brown sugar or substituting a sugar-free brown sugar.
Variations on Caramelized Onions
- Garlic twist: add minced garlic in the last few minutes of cooking for savory depth.
- Herb flavor: stir in fresh thyme or rosemary while the onions cook.
- Spicy kick: add a pinch of crushed red pepper flakes for heat.
Tips for Perfect Caramelized Onions
- Go low and slow. Cooking over medium-low heat prevents burning and allows sugars to develop.
- Stir occasionally. Too much stirring prevents browning, but don't let them stick.
- Deglaze if needed. Use a splash of water, broth, or wine to release browned bits for extra flavor.
How to Store and Reheat
Refrigerate caramelized onions in an airtight container for up to 1 week. Reheat gently in a skillet over low heat with a splash of water to bring them back to life.
More Easy Onion Recipes You'll Love
For more onion-inspired dishes, try my French Onion Soup that's always a family favorite. You may also enjoy this Creamy Caramelized Onion Dip, Caramelized Onions with Rootbeer Glaze, and Crockpot Roast with Onion Gravy.
When you make this recipe, please comment below and let me know what you think. I'd love it if you tag me on Instagram @grumpyshoneybunch or #grumpyshoneybunch so I can see your photos!
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📖 Recipe
Caramelized Onions
Equipment
- Airtight container
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Ingredients
- 2 large onions sliced
- 1 tablespoon olive oil
- 1 tablespoon butter
- 1 tablespoon brown sugar (optional)
- ½ teaspoon salt
- ¼ teaspoon black pepper
Instructions
- Heat the olive oil and butter in a large skillet over medium heat until melted.
- Gradually add the onion slices one handful at a time, stirring after each addition.
- Cook the onions over medium-low heat for 15 minutes, stirring every few minutes, until golden in color. Add a splash of water if the onions start to cook off the liquid they release to keep them from burning.
- Stir in the brown sugar and cook for 30 seconds. Turn off the heat and cool. Store in an airtight container in the refrigerator for up to 1 week.
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