Creamy Baked Hot Onion Dip
This hot onion dip is a creamy, savory, baked appetizer made with slowly softened onions and a rich, scoopable base that turns golden and bubbly in the oven. Instead of raw or harsh onion flavor, the onions are gently cooked first, which mellows their bite and brings out natural sweetness before everything is baked together. It delivers a deep, comforting onion flavor with a smooth texture that’s easy to prep and even easier to serve at parties, holidays, or casual gatherings.
Servings: 6 - 8 people
Ingredients
- 2 Tablespoons olive oil
- 1 large vidalia onion chopped (or sub in a yellow onion)
- 1 large yellow onion chopped
- 1 medium-large shallot sliced thin
- salt and pepper to taste
- 2 cloves garlic minced
- Optional: A pinch of crushed red pepper if you like a little heat
- ½ cup full-fat Greek yogurt or sour cream
- ½ cup Vegenaise or mayonnaise I use soy-free Vegenaise.
- 2/3 cup grated Pecorino or Parmigiano Reggiano
- 4 ounces mozzarella cheese shredded or gruyere or fontina or Mexican blend or a combination of whatever you have
- Serving suggestions: crackers baguette, thick potato chips, carrot sticks, endive leaves.
Instructions
- Preheat oven to 375 degrees F.
- Warm a large skillet over medium heat. Add olive oil, then onions, shallots and season with salt and pepper. Stir occasionally until the onions and tender and start to turn a light golden brown, about 15-20 minutes. (If the onions are getting too dark before getting tender, turn the heat down and add a couple tablespoons of water.)
- Add the garlic and cook until fragrant, about 1 minute.
- In a large bowl, combine the Greek yogurt, mayonnaise, and both cheeses. Fold in the caramelized onions from the skillet until well combined. Transfer mixture into a 9- or 10-inch oven-proof dish and bake for 20-25 minutes, until hot and cheese is melted. Serve immediately.
Notes
- Take your time with the onions. Slow-cooked, golden onions bring sweetness and depth that rushed onions never will.
- Use a mix of onions. Yellow onions add savory depth while Vidalia onions bring natural sweetness, creating a more balanced, well-rounded dip.
- Don’t overdo the fat. Too much cheese or mayo can cause the dip to separate as it bakes. A balanced dairy base keeps it creamy.
- Let it rest before serving. Five minutes out of the oven helps the dip thicken slightly and makes it easier to scoop.
- Bake until just bubbly. Overbaking dries the edges and dulls the flavor. Pull it once the center is hot and lightly golden.
- Serve it warm, not piping hot. The flavor is best once it cools just enough to settle.
- This hot onion dip is easy to prep ahead. You can cook the onions and shallots up to 2 days in advance and refrigerate them once cooled. When ready to serve, mix the onion mixture with the remaining ingredients, transfer to a baking dish, and bake as directed.
- You can also assemble the entire dip ahead of time, cover tightly, and refrigerate for up to 24 hours before baking. Let it sit at room temperature for about 20 minutes while the oven preheats, then bake until hot and bubbly.
- Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in a 350°F oven until warmed through, or microwave at low power in short intervals, stirring once or twice to maintain a smooth, creamy texture. The dip will thicken slightly as it cools, which is completely normal.