French onion dip: deep onion flavor in a cool base

COOK IT AT HOME

Caramelized Onion and Yogurt Dip

A good onion dip starts in the skillet, not in the mixing bowl. Slowly cooked onions provide sweetness and a rounded savory flavor, while thick yogurt keeps the finished dip tangy. This home version uses sour cream for a soft texture and a little lemon to keep the result lively. The onions must cool before they meet the dairy; otherwise the dip becomes loose and the herbs lose their fresh flavor.

Makes

8 appetizer servings

Prep

15 minutes

Cook

40 minutes

Additional time

1 hour chilling

A home-kitchen recipe to accompany this guide. Ingredient brands and equipment can change cooking times; use the texture and doneness cues below.

Ingredients

• 2 large yellow onions, about 500 g, finely diced
• 2 tablespoons olive oil
• 1/2 teaspoon fine salt, divided
• 2 tablespoons water, plus up to 2 tablespoons more if needed
• 1 cup plain full-fat Greek yogurt
• 1/2 cup sour cream
• 1 tablespoon lemon juice
• 1/2 teaspoon garlic powder
• 1/4 teaspoon black pepper
• 2 tablespoons finely sliced chives
• 200 g pita chips or sliced vegetables, for serving

Step-by-step method

1. Heat the oil in a wide skillet over medium heat. Add the onions and 1/4 teaspoon salt. Cook for 5 minutes, stirring often, until the onions begin to soften. Reduce the heat to medium-low so they sizzle gently rather than fry aggressively.
2. Continue cooking for 30–35 minutes, stirring every few minutes and scraping the bottom. Add the measured water a tablespoon at a time whenever brown residue collects on the pan. The onions should become deep golden, soft and sweet; blackened edges indicate that the heat is too high.
3. Spread the onions on a plate and cool for 20 minutes. Do not mix them into the dairy while hot. Meanwhile, whisk the yogurt, sour cream, lemon, garlic powder, pepper and remaining 1/4 teaspoon salt in a bowl.
4. Fold in the cooled onions and 1 tablespoon chives. Cover and refrigerate for at least 1 hour so the onion flavor spreads through the base. Stir again before serving; the dip will become slightly thicker as it chills.
5. Transfer to a shallow bowl, scatter over the remaining chives and serve with the pita chips or vegetables. For a buffet, put out a small bowl and replenish from the refrigerator instead of leaving the entire batch on the table.

Helpful tips & substitutions

• Use a wide pan: crowded onions steam for longer before they begin to brown. If your skillet is small, allow another 10 minutes rather than increasing the heat.
• For an all-yogurt version, replace the sour cream with an equal amount of full-fat Greek yogurt. The result is tangier and slightly firmer; avoid thin drinking yogurt.

Storage & make-ahead

Refrigerate in a covered container at 40°F/4°C or below for up to 3 days. Keep serving utensils clean and refrigerate within 2 hours, or 1 hour if the room or outdoor temperature exceeds 90°F/32°C. Freezing is not recommended because the dairy can separate.

How to serve it

Serve alongside cucumber spears, radishes and warm flatbread. Its cool, sweet-onion character also works as a small accompaniment to grilled chicken or roasted potato wedges.