This dip takes ordinary onions and transforms them into something luxurious. The slow caramelization process brings out their natural sweetness, and when blended with creamy sour cream and mayo, the result is addictively smooth and flavorful. It’s make-ahead friendly, always a hit at gatherings, and better than any store-bought version.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Yellow onions (thinly sliced)
Olive oil or butter
Salt
Sugar (optional, to enhance caramelization)
Sour cream
Mayonnaise
Garlic powder
Black pepper
Worcestershire sauce (optional, for umami depth)
Optional garnish: chopped chives, parsley, or extra caramelized onions
Directions
Heat olive oil or butter in a large skillet over medium-low heat.
Add sliced onions and a pinch of salt. Cook slowly, stirring often, for 30–40 minutes until deeply golden and soft.
Optional: Add a small pinch of sugar midway to enhance sweetness.
Once caramelized, remove from heat and let the onions cool.
In a bowl, mix sour cream, mayonnaise, garlic powder, black pepper, and Worcestershire sauce.
Chop the cooled onions and fold them into the creamy base.
Cover and chill for at least 1 hour to let the flavors meld.
Garnish with fresh herbs before serving if desired.
Servings and timing
This recipe makes about 2 cups of dip, serving 6 to 8 people. Prep time: 10 minutes Cook time: 40 minutes Chill time: 1 hour Total time: About 1 hour 50 minutes
Variations
Greek Yogurt Swap: Substitute Greek yogurt for some or all of the sour cream for a lighter version.
Spicy Kick: Add a pinch of cayenne or finely diced jalapeño.
Cheesy Onion Dip: Stir in a bit of shredded gruyère or cheddar for extra richness.
Vegan Version: Use vegan mayo and dairy-free sour cream.
Herbed Dip: Add thyme or rosemary to the onions while they cook for extra depth.
Storage/Reheating
Storage: Store in an airtight container in the refrigerator for up to 4 days.
Reheating: This dip is typically served cold or at room temperature, but you can gently warm it in the microwave if desired.
Freezing: Not recommended, as the texture may separate once thawed.
FAQs
Why do the onions take so long to cook?
Slow cooking at low heat allows the natural sugars in the onions to caramelize without burning, giving them a rich, sweet flavor.
Can I make this dip ahead of time?
Yes! It’s even better the next day after the flavors have had more time to meld.
What’s the best onion to use?
Yellow onions are ideal for caramelizing due to their natural sweetness.
Can I speed up the onion caramelization?
You can add a pinch of sugar and a splash of water or vinegar to help, but true caramelization still takes time.
Is this dip served hot or cold?
It’s typically served chilled or at room temperature.
What can I serve with caramelized onion dip?
Chips, crackers, pita bread, sliced baguette, or raw veggies all work great.
Can I use only mayo or only sour cream?
Yes, but the combination provides the best balance of tang and creaminess.
What makes this dip better than store-bought?
Freshly caramelized onions give it unmatched depth and texture, without preservatives.
Can I use red or white onions?
Red onions can work but will have a slightly different sweetness. White onions are less ideal due to their sharper bite.
How long does this dip last in the fridge?
Up to 4 days when stored in an airtight container.
Conclusion
Caramelized onion dip is a crowd-pleasing classic that turns simple ingredients into something unforgettable. The slow-cooked onions bring natural sweetness and richness, perfectly balanced by a creamy, tangy base. Whether for game day, holiday parties, or just a cozy night in, this dip is always a winning choice.
Caramelized onion dip is a rich, savory, and creamy appetizer made with slow-cooked onions and a tangy sour cream and mayo base. It’s a crowd-pleasing favorite that’s perfect for parties, snacks, or spreads.
Ingredients
2 large yellow onions, thinly sliced
2 tablespoons olive oil or butter
1/2 teaspoon salt
1/2 teaspoon sugar (optional)
1 cup sour cream
1/2 cup mayonnaise
1/2 teaspoon garlic powder
1/4 teaspoon black pepper
1 teaspoon Worcestershire sauce (optional)
Optional garnish: chopped chives, parsley, or extra caramelized onions
Instructions
Heat olive oil or butter in a large skillet over medium-low heat.
Add sliced onions and salt. Cook slowly, stirring often, for 30–40 minutes until golden brown and soft. Add sugar midway if using to enhance caramelization.
Remove onions from heat and let cool completely.
In a mixing bowl, combine sour cream, mayonnaise, garlic powder, black pepper, and Worcestershire sauce.
Chop the cooled caramelized onions and fold into the creamy mixture.
Cover and refrigerate for at least 1 hour to allow flavors to meld.
Garnish with fresh herbs or extra onions before serving, if desired. Serve with chips, crackers, or veggies.
Notes
Slow caramelization is key—don’t rush the onions for best flavor.Use Greek yogurt in place of sour cream for a lighter version.Prepare a day ahead for even deeper flavor.This dip is best served cold or at room temperature.Store leftovers in an airtight container in the fridge for up to 4 days.
