Why You’ll Love Caramelized Onion Dip Recipe

The slow caramelization of sweet onions brings out deep, sweet‑savory layers of flavor.
The combination of sour cream (or Greek yogurt) and mayonnaise creates a creamy, smooth texture that’s ideal for dipping.
It’s made with simple, everyday ingredients and allows for make-ahead prep.
Versatile and crowd-pleasing — perfect for parties, snacking, or serving alongside a meal.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
unsalted butter
sweet onions, chopped
kosher salt and pepper
sour cream or plain Greek yogurt
mayonnaise
garlic powder
fresh herbs (like parsley), optional for topping

Directions

In a large skillet or pot over medium heat, melt the butter. Add the chopped onions along with a generous pinch of salt and pepper. Stir for about 5 minutes, just until the onions begin to soften.
Reduce the heat to low (or medium-low) and continue cooking the onions, stirring often, until they are dark brown and deeply caramelized. This takes 30 to 60 minutes. Stir frequently and add a splash of water if the pan becomes too dry.
Once the onions are caramelized, let them cool slightly. You can also refrigerate them for later use.
In a mixing bowl, whisk together the sour cream (or Greek yogurt), mayonnaise, garlic powder, and a pinch of salt and pepper.
Stir in the cooled onions until well combined. Taste and adjust seasoning as needed.
Serve immediately with chips, crackers, or vegetables, or chill until ready to serve.

Servings and timing

Makes about 2 to 3 cups of dip, suitable for 6 to 8 people as an appetizer.
Total time: approximately 1 hour 15 minutes (including caramelizing time).

Variations

Substitute plain Greek yogurt for sour cream for a tangier, lighter version.
Add chopped fresh herbs like chives or thyme for extra flavor.
For a thicker dip, fold in a few tablespoons of softened cream cheese.
Enhance depth with a dash of Worcestershire sauce or smoked paprika.
Adjust the creaminess by varying the mayo-to-yogurt ratio to suit your taste.

Storage/Reheating

Store the dip in an airtight container in the refrigerator for up to 4 days.
If prepared ahead, allow the dip to sit at room temperature for 15–20 minutes before serving.
Caramelized onions can be cooked and refrigerated separately for up to 3 days and reheated gently on the stove or in the microwave before mixing.

FAQs

What kind of onions should I use?

Sweet onions are best because they caramelize well and develop a natural sweetness, but yellow onions can also be used.

Can I use nonfat Greek yogurt instead of sour cream?

Yes, though it will result in a tangier, slightly thinner dip. Full-fat yogurt gives a creamier texture.

How long do I need to caramelize the onions?

Plan for at least 30 to 60 minutes. The longer and slower you cook them, the deeper and sweeter the flavor.

Can I caramelize the onions ahead of time?

Yes. You can refrigerate them for up to 3 days and reheat before adding to the dip.

Will the dip thicken or thin in the fridge?

It thickens slightly when chilled. Let it sit at room temperature for a bit before serving if needed.

Is this dip gluten-free?

Yes, the dip itself is gluten-free. Just be sure to serve it with gluten-free dippers.

Can I make this dip vegan?

Use plant-based butter, vegan mayo, and dairy-free yogurt. The taste and texture will differ but it can still be delicious.

What’s the best way to serve it?

Serve with chips, crackers, pretzels, or raw veggies like carrots and bell peppers.

Can I double the recipe?

Yes, just be sure to use a large enough skillet for caramelizing the onions evenly.

How do I prevent the onions from burning while caramelizing?

Cook them on low heat, stir frequently, and add a splash of water if the pan becomes dry.

Conclusion

This caramelized onion dip is proof that a handful of basic ingredients can become something extraordinary. The sweet, deeply golden onions paired with a creamy base make it irresistibly good. Whether you’re preparing for a gathering or simply craving a savory snack, this dip is an easy-to-make classic that will quickly become a favorite.