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Creamy Baked Caramelized Onion Dip

A rich and creamy dip packed with caramelized onions and cheese, perfect for gatherings and cozy nights.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 8 servings
Course: Appetizer, Snack
Cuisine: American
Calories: 150
Ingredients Method Notes

Ingredients
  

For the Dip
  • 2 tablespoons olive oil Used for sautéing the onions
  • 2 large yellow onions, finely chopped Key ingredient for caramelizing
  • 1 medium shallot, thinly sliced Adds sweetness
  • 3/4 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 teaspoon granulated sugar Enhances caramelization
  • 3 cloves garlic, minced For added flavor
  • 1 pinch crushed red pepper flakes Optional, for heat
  • 3/4 cup full-fat Greek yogurt or sour cream Both work well
  • 2/3 cup mayonnaise Adds creaminess
  • 3/4 cup finely grated hard Italian-style cheese e.g., Parmigiano-Reggiano
  • 6 ounces shredded mozzarella cheese For gooey texture

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C) and lightly grease a small to medium baking dish.
  2. In a large skillet, warm the olive oil over medium heat. Add the chopped onions and shallots, sprinkle with salt, pepper, and sugar.
  3. Cook slowly for about 20–25 minutes, stirring occasionally until the onions are deep golden and soft.
  4. Stir in the minced garlic and red pepper flakes if using, and cook for about 1 minute until fragrant. Remove from heat.
  5. In a medium bowl, combine yogurt or sour cream, mayonnaise, grated cheese, and shredded mozzarella. Stir until smooth.
  6. Fold the warm onion mixture into the creamy cheese base until well combined.
  7. Spoon the mixture into the prepared baking dish and spread evenly.
  8. Bake uncovered for 22–25 minutes, or until hot, bubbly, and lightly golden on top. Broil briefly at the end for color.
  9. Let it rest for about 5 minutes before serving.

Notes

This dip can be paired with crunchy crackers, tortilla chips, or fresh veggies. Store leftovers in an airtight container in the refrigerator for up to three days.