This baked caramelized onion dip is smooth, creamy, wonderfully cheesy, and filled with rich, jammy onions that melt into every bite. It is a delicious appetizer for a cozy date night, a holiday gathering, or a game day party.
When appetizer season arrives, a warm, cheesy dip is always a welcome addition to the table. Whether you are planning a game day spread, a casual get-together, or a special night in, this baked caramelized onion dip is the kind of recipe that feels both comforting and a little bit special.
The star of the dish is the caramelized onions. They cook slowly until deep golden brown, soft, and sweet, giving the dip its signature rich flavor. Once folded into cream cheese, mayonnaise, and freshly grated Gruyère, the onions turn a simple dip into something truly memorable.
Why You’ll Love this Recipe
This baked caramelized onion dip is creamy, savory, and packed with flavor. It has the cozy appeal of a hot cheese dip, but the slow-cooked onions add depth and sweetness that make it stand out from a basic party appetizer.
Caramelizing onions does take a little patience, but the process is simple and absolutely worth it. Most of the time is hands-off, requiring only an occasional stir as the onions soften and turn beautifully golden. Once the onions are ready, the rest of the recipe comes together quickly. Mix the creamy base, fold in the onions, top with more cheese, and bake until the edges are bubbling.
This is an easy appetizer that works for many occasions. Serve it with crostini, crackers, toasted bread, or fresh vegetables. It is rich enough for a special occasion but simple enough to make for a casual weekend snack.
Ingredients You’ll Need
- Unsalted butter
- Olive oil
- Yellow onions
- Coarse kosher salt and black pepper
- Fresh thyme
- Worcestershire sauce
- Cream cheese
- Mayonnaise
- Gruyère cheese
- Crostini for serving
Step-By-Step Instructions
The first step is to caramelize the onions. Melt the butter with the olive oil in a large, deep skillet over medium-low heat. Add the sliced onions and cook them slowly, stirring occasionally, for about 35 to 40 minutes. The onions should become very soft, sweet, and deeply golden.
The second step is to season the onions. Stir in the kosher salt, black pepper, fresh thyme leaves, and Worcestershire sauce. Mix until everything is well combined, then remove the skillet from the heat. The onions should look rich, glossy, and dark golden brown.
The third step is to prepare the creamy base. Add the softened cream cheese, mayonnaise, and one cup of freshly grated Gruyère cheese to a large bowl. Mix until the mixture is smooth and evenly combined.
The fourth and final step is to assemble and bake the dip. Fold about two thirds of the caramelized onions into the cheese mixture, then spread it into a one-quart baking dish. Spoon the remaining onions over the top in small amounts, then sprinkle with the remaining half cup of Gruyère. Bake at 400 degrees until the dip is hot and bubbling around the edges, about 20 minutes.
This baked caramelized onion dip is especially good with store-bought crostini, but it also pairs well with fresh vegetables. The creamy cheese, savory seasoning, and sweet onions create a warm appetizer that is easy to love.
Serve it for game day, a party, or a relaxed evening at home. It is the kind of hot onion dip that disappears quickly, so make sure to have plenty of dippers ready.
A Few Cook’s Notes for Baked Caramelized Onion Dip
For the smoothest texture, freshly grate the Gruyère cheese instead of using pre-shredded cheese. Freshly grated cheese melts more evenly and does not contain the anti-caking agents often found in bagged shredded cheese.
This dip can be prepared ahead of time and baked just before serving. Assemble it in the baking dish, cover it, refrigerate it, and bake when you are ready to enjoy it.
More Delicious Appetizer Recipes to Enjoy
Cheesy Thumbprints with Red Pepper Jelly
Texas Trash Dip
Cheesy Sausage Rotel Dip
Baked Caramelized Onion Dip
Ingredients
- 2 Tbsp. olive oil
- 2 Tbsp. unsalted butter
- 2 large yellow onions, sliced, then quartered, about 5 cups total
- 1/2 tsp. coarse kosher salt
- 1/4 tsp. black pepper
- 1 Tbsp. Worcestershire sauce
- 1 Tbsp. fresh thyme leaves
- 1 8-oz. package cream cheese, room temperature
- 1/2 cup mayonnaise
- 1 1/2 cups Gruyère cheese, freshly grated and divided
- crostini, for serving
Instructions
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Preheat the oven to 400 degrees. Spray a one-quart baking dish with nonstick baking spray and set it aside.
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In a large, deep skillet, melt the butter with the olive oil over medium-low heat. Add the onions and cook, stirring occasionally, until caramelized, about 35 to 40 minutes. Stir in the kosher salt, black pepper, fresh thyme leaves, and Worcestershire sauce. Remove the onions from the heat.
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Add the softened cream cheese, mayonnaise, and one cup of freshly grated Gruyère to a large bowl. Mix until smooth. Fold in two thirds of the caramelized onions, then spread the mixture into the prepared baking dish. Top with the remaining onions and the remaining half cup of Gruyère cheese.
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Bake for 20 minutes, or until the dip is hot and bubbling around the edges. Serve warm with crostini, crackers, or fresh vegetables.
Notes
This dip can be assembled ahead of time and baked just before serving.