If you are on the hunt for a dip that feels like a warm hug at any gathering, look no further than this Caramelized Onion Dip with Parmesan and Mozzarella Recipe. It brings together the sweet richness of slow-cooked onions with the luscious creaminess of Parmesan and mozzarella, delivering a party-perfect balance of flavors and textures. Whether you are hosting a casual get-together or just want to enjoy something indulgent during a quiet night in, this dip transforms simple ingredients into a crowd-pleaser that everyone will rave about.

Ingredients You’ll Need
This Caramelized Onion Dip with Parmesan and Mozzarella Recipe relies on straightforward, pantry-friendly ingredients that each play a vital role in creating its irresistible taste and texture. Every component, from the onions to the cheeses, enhances the dish’s depth and creamy finish.
- 3 large onions, thinly sliced: The star ingredient that becomes sweet and tender when caramelized, building the base flavor.
- 2 tablespoons olive oil: Adds richness and helps gently cook the onions evenly without burning.
- 1 tablespoon butter: Provides a silky mouthfeel and aids in browning the onions beautifully.
- 1 teaspoon brown sugar: Encourages caramelization, intensifying the sweet notes of the onions.
- 1/2 teaspoon salt: Enhances all the flavors while drawing moisture from the onions for perfect texture.
- 2 cloves garlic, minced: Adds a subtle punch of savory warmth without overpowering the onions.
- 1 cup sour cream: Gives the dip a tangy creaminess that balances the richness of the cheese.
- 1/2 cup cream cheese, softened: Contributes a smooth base that binds all ingredients with a velvety body.
- 1/2 cup mayonnaise: Adds moisture and an extra layer of luscious, mild flavor.
- 1/2 cup grated Parmesan cheese: Brings a salty, nutty bite that deepens the complexity.
- 1/2 cup shredded mozzarella cheese: Melts beautifully to create a gooey, irresistible texture.
- 1/4 teaspoon black pepper: Adds a hint of heat and aromatics to lift the dip gently.
- 1/4 teaspoon smoked paprika (optional): Offers a subtle smoky undertone that elevates the overall flavor profile.
- Fresh herbs (parsley or chives), for garnish: Provide a fresh contrast and pop of color for a pretty presentation.
- Crusty bread, chips, or crackers, for serving: Perfect vehicles for scooping up every creamy, cheesy bite.
How to Make Caramelized Onion Dip with Parmesan and Mozzarella Recipe
Step 1: Caramelize the Onions
Start by heating the olive oil and butter in a large skillet over medium-low heat. The combination of oil and butter ensures that the onions cook slowly and evenly, developing their magic without burning.
Step 2: Cook Onions with Sugar and Salt
Add your thinly sliced onions along with the salt and brown sugar. Stir occasionally as the onions soften and gradually turn a gorgeous golden brown. This process takes about 20-25 minutes, but it’s worth the time for that rich, sweet flavor that forms.
Step 3: Add Garlic
Once your onions are beautifully caramelized, stir in the minced garlic and cook for an additional 2-3 minutes until fragrant. Then remove the skillet from heat and set aside to cool slightly.
Step 4: Prepare the Dip Base
In a large mixing bowl, combine the sour cream, cream cheese, mayonnaise, grated Parmesan, shredded mozzarella, black pepper, and smoked paprika if you’re using it. Mix these ingredients until they come together smooth and creamy — this luscious base will perfectly support the caramelized onions.
Step 5: Combine Onions and Dip Base
Fold the caramelized onions into the dip mixture carefully, making sure they are evenly distributed. This brings all your flavors together into one harmonious blend that will melt in your mouth.
Step 6: Bake the Dip
Preheat your oven to 375°F (190°C). Transfer the dip mixture into an oven-safe dish and smooth out the top. Bake for about 20-25 minutes until the dip is bubbly and turns a beautiful golden brown on the surface, signaling it’s ready to be devoured.
Step 7: Cool and Garnish
Once baked, remove the dip from the oven and let it cool just enough so it is warm and inviting, but not too hot to eat. Garnish generously with freshly chopped parsley or chives to add a vibrant splash of color and a fresh note.
How to Serve Caramelized Onion Dip with Parmesan and Mozzarella Recipe

Garnishes
Fresh herbs like parsley or chives not only add a burst of color but also a delicate sharpness that cuts through the richness of the cheese and caramelized onions. Adding a sprinkle of extra Parmesan on top before baking can also enhance the flavor and create an appealing crust.
Side Dishes
This dip shines best when paired with crusty bread, crunchy chips, or crispy crackers. The different textures from your dipping options create a delightful contrast to the creamy, cheesy dip, making every bite super satisfying.
Creative Ways to Present
For a show-stopping appetizer, serve this dip in a hollowed-out bread bowl alongside a platter of colorful vegetable crudités. You can also spoon it into small ramekins for individual servings, perfect for elegant dinner parties or casual get-togethers.
Make Ahead and Storage
Storing Leftovers
After enjoying the dip, any leftovers should be transferred to an airtight container and refrigerated. It will keep well for 3-4 days, allowing you to savor that Caramelized Onion Dip with Parmesan and Mozzarella Recipe flavor even after the initial party.
Freezing
You can freeze this dip, but keep in mind the texture might slightly shift due to the cheeses and sour cream. Store it in a sealed freezer-safe container for up to 2 months. Thaw it in the refrigerator overnight before reheating gently.
Reheating
To reheat, warm the dip in a low oven (around 325°F) until heated through, stirring occasionally to retain its creamy consistency. Avoid microwaving on high heat, which can cause separation and texture changes. Reheating carefully helps preserve the delicious flavors of this Caramelized Onion Dip with Parmesan and Mozzarella Recipe.
FAQs
Can I use other types of cheese instead of Parmesan and Mozzarella?
Absolutely! While Parmesan and mozzarella give this dip its signature flavor and texture, you can experiment with cheeses like Gruyère, fontina, or even sharp cheddar to customize the taste to your liking.
What is the best type of onion to use for caramelizing in this recipe?
Yellow onions are ideal due to their natural sweetness, which intensifies when caramelized. Sweet onions work too if you want a more pronounced sweetness, but avoid very sharp onions like red or white for this recipe.
Can this dip be made vegan or dairy-free?
With some substitutions, yes! Use plant-based sour cream, cream cheese, and mayonnaise alternatives, and swap the Parmesan and mozzarella for vegan cheeses that melt well. Keep in mind the flavor will change slightly but can still be delicious.
How long can I caramelize the onions for the best flavor?
About 20-25 minutes is perfect to develop deep, golden sweetness without burning. Slow and steady cooking over medium-low heat is key to avoiding bitterness and achieving that melt-in-your-mouth softness.
Is it possible to make this dip ahead of time before baking?
Definitely! You can prepare the whole dip up to the baking step, cover it, and refrigerate for up to 24 hours. When ready, bake it fresh to enjoy warm, bubbly goodness right out of the oven.
Final Thoughts
If comfort food had a star player, this Caramelized Onion Dip with Parmesan and Mozzarella Recipe would steal the spotlight every time. It’s approachable yet irresistibly flavorful, perfect for impressing friends or simply treating yourself. Once you try it, you’ll understand why it quickly became one of my all-time favorites to make again and again. Dive in and enjoy the cozy, cheesy magic for yourself!
Print
Caramelized Onion Dip with Parmesan and Mozzarella Recipe
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Yield: 8 servings
- Category: Appetizer
- Method: Baking
- Cuisine: American
Description
This Caramelized Onion Dip is a rich and creamy appetizer featuring sweet, golden-brown caramelized onions blended with sour cream, cream cheese, mayonnaise, and a mix of Parmesan and mozzarella cheeses. Baked until bubbly and golden, it’s perfect for serving warm alongside crusty bread, chips, or crackers, making it a crowd-pleasing dip for any gathering or party.
Ingredients
Caramelized Onions
- 3 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 1 teaspoon brown sugar
- 1/2 teaspoon salt
- 2 cloves garlic, minced
Dip Base
- 1 cup sour cream
- 1/2 cup cream cheese, softened
- 1/2 cup mayonnaise
- 1/2 cup grated Parmesan cheese
- 1/2 cup shredded mozzarella cheese
- 1/4 teaspoon black pepper
- 1/4 teaspoon smoked paprika (optional)
For Serving & Garnish
- Fresh herbs (parsley or chives), for garnish
- Crusty bread, chips, or crackers, for serving
Instructions
- Caramelize the Onions: Heat the olive oil and butter in a large skillet over medium-low heat to create the perfect base for caramelization.
- Cook the Onions: Add the thinly sliced onions along with salt and brown sugar to the skillet. Stir occasionally as you cook them for about 20-25 minutes, allowing the onions to soften and develop a deep golden brown color.
- Add Garlic: Mix in the minced garlic and cook for another 2-3 minutes until fragrant, then remove the skillet from heat and set aside.
- Prepare the Dip Base: In a large mixing bowl, combine the sour cream, softened cream cheese, mayonnaise, grated Parmesan, shredded mozzarella, black pepper, and smoked paprika if using.
- Mix the Dip Base: Stir all the ingredients until the mixture is smooth and well combined, ensuring an even consistency.
- Combine Onions with Dip: Fold the caramelized onions gently into the dip base, making sure they are evenly distributed throughout the mixture.
- Preheat Oven: Set your oven to 375°F (190°C) in preparation for baking the dip.
- Transfer to Baking Dish: Spoon the combined dip mixture into an oven-safe baking dish and smooth out the top for even cooking.
- Bake the Dip: Bake for 20-25 minutes, or until the dip becomes bubbly and develops a golden brown top layer.
- Cool Slightly: Remove the baked dip from the oven and allow it to cool for a few minutes before serving to let the flavors meld.
- Serve: Garnish the dip with fresh herbs like parsley or chives and serve warm with crusty bread, chips, or crackers for an irresistible appetizer.
Notes
- Caramelizing onions is key for a deep, sweet flavor—be patient and cook on medium-low heat to avoid burning.
- Smoked paprika adds a subtle smoky note, but it’s optional depending on your taste preference.
- For a thicker dip, chill it for 30 minutes before baking or add an extra 1/4 cup of cream cheese.
- Leftover dip can be stored in the refrigerator for up to 3 days and reheated gently in the oven.
- To make this recipe gluten-free, serve with gluten-free crackers or veggies instead of bread or regular chips.

