French Onion Dip · Caramelized Onion
Caramelized French Onion Dip
Onions cooked low and slow until jammy and deep brown, then folded into sour cream with a little mayonnaise, Worcestershire and chives. The from-scratch version of the party classic, made for potato chips.
- Prep
- 10 min
- Cook
- 40 min
- Total
- 1 hr 50 min
- Serves
- about 2 cups
- Level
- Easy
Ingredients
- 2 tbsp butter
Swaps for butter
Instead of butter
- Plant-based butter sticks: The same amount. The closest swap.
- Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.
- Vegetable oil: 3 tbsp oil for every 4 tbsp (¼ cup) melted butter. Cakes and muffins come out moister and stay soft longer, without a buttery taste.
Cooking for an allergy? Check every label.
- 1 tbsp olive oil
Swaps for olive oil
Instead of olive oil
- Avocado oil or another neutral oil: The same amount. No olive flavor; avocado oil handles higher heat.
- Butter: The same amount. Richer and nutty when browned.
- A neutral oil + more seasoning: The same amount. Dressings lose the fruity, peppery note; a little extra lemon, garlic or mustard makes up for it.
- 2 large yellow onions, halved and thinly sliced
Swaps for yellow onions
Instead of onion
- Another onion: The same amount. Yellow is the all-rounder; white is sharper and crisper; red is milder raw and adds color; sweet onions are mildest.
- Shallots: The same amount, chopped. Milder and sweeter, with a hint of garlic.
- Leeks: About 1½ times as much, white and light green parts. Milder and softer when cooked.
- ¾ tsp kosher salt, divided
Swaps for kosher salt
Instead of salt
- Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
- Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.
- 1 tbsp water, as needed
- 1 ½ cups sour cream ≈ 345 g
Swaps for sour cream
Instead of sour cream
- Plain Greek yogurt: The same amount (full-fat for baking). Tangier and a little less rich.
- Crème fraîche: The same amount. Richer and milder, and it doesn't curdle in hot sauces.
- Cottage cheese, blended: The same amount, blended smooth with a squeeze of lemon. Milder and less rich, with more protein.
- ¼ cup mayonnaise ≈ 55 g
Swaps for mayonnaise
Instead of mayonnaise
- Plain Greek yogurt: The same amount. Tangier and lighter; a bit looser.
- Egg-free (vegan) mayo: The same amount. Very close.
- Sour cream: The same amount. Tangier and less rich.
Cooking for an allergy? Check every label.
- 1 tsp Worcestershire sauce
Swaps for Worcestershire sauce
Instead of Worcestershire sauce
- Soy sauce + vinegar: 1 tbsp soy sauce + ¼ tsp vinegar + a pinch of sugar for each 1 tbsp. Savory and tangy, less complex.
- Vegan Worcestershire: The same amount. Very close, with no anchovies.
- ¼ tsp garlic powder
Swaps for garlic powder
Instead of garlic
- Fresh garlic: 1 clove for each ⅛ tsp powder, minced fine. Sharper and stronger.
- Granulated garlic: About twice as much as the powder. The same flavor in coarser grains, which blend better into rubs.
- ¼ tsp black pepper
- 2 tbsp fresh chives, finely chopped
Swaps for fresh chives
Instead of chives
- Dried chives: 1 tsp dried for each 1 tbsp chopped fresh (a third as much). Freeze-dried chives keep color but little flavor; use them only as a garnish.
- Green onion tops: The same amount, sliced thin. Stronger and crunchier.
- To serve
- potato chips, for serving
Weights from USDA FoodData Central cup weights. Counted things (eggs, cloves, cans) stay as counts, and salt stays in spoons: kosher and flaky salts weigh very differently by brand.
Missing something? Tap Swaps next to an ingredient, or see all substitutions.
Steps
Kid helper. A child can do steps 4, 5 and 6: no knife, no heat. Steps marked “Grown-up” use a knife or heat. Cooking with kids
- Melt the butter with the oil in a large skillet over medium heat. Add the onions and 1/4 teaspoon of the salt and stir to coat.Grown-up: heat
- Cook, stirring every few minutes, until the onions are soft, sticky and deep golden brown. Lower the heat if they brown too fast, and add a splash of water to loosen any dark bits stuck to the pan.⏱ Caramelize onions: 40 minGrown-up: heat
- Spread the onions on a plate and let them cool completely, then⏱ Cool onions: 15 minGrown-up: knife, heatthem finely.
chop (how to chop)
Chop Cut food into bite-size pieces that don't have to match exactly. 1. Cut a flat side on round food and lay it on that side so it can't roll.2. Slice the food into strips about as wide as the pieces you want.3. Turn the strips and cut across them.4. Rock the knife over any big pieces until they are about the same size. Done when: The pieces are close enough in size to cook in the same time, about ½ inch unless the recipe says otherwise. Safety: Keep the fingertips of your guiding hand curled under, knuckles toward the blade, and set the board on a damp towel so it can't slide.How to chop vegetables and herbs: mistakes to avoid - Stir the sour cream, mayonnaise, Worcestershire, garlic powder, pepper and remaining salt together in a bowl.Kid step
- ⏱ Chill dip: 45 minKid stepin the onions and most of the chives, then cover and refrigerate so the flavors blend.
Fold (how to fold)
Fold Combine a light mixture (whipped cream, beaten whites) or chunky add-ins into a batter gently, so it stays airy. 1. Put the lighter mixture on top of the heavier one, or add the flour or chips.2. Cut a rubber spatula straight down through the middle to the bottom of the bowl.3. Sweep it across the bottom and up the side, then turn it over on top.4. Turn the bowl a quarter turn and repeat.5. Stop as soon as no streaks remain. Done when: There are no dry streaks or white blobs, and the mixture still looks light and puffy. Safety: Batters with raw eggs or flour aren't safe to eat raw.How to fold ingredients into a batter: mistakes to avoid - Stir, taste for salt and sprinkle with the rest of the chives before serving with chips.Kid step
Tap an underlined word for how to do it, or see all techniques.
Tips
- Don't rush the onions on high heat; slow cooking turns their sugars sweet and savory instead of burnt.
- It tastes even better the next day.
Storage
Refrigerate up to 4 days. Don't leave it out at room temperature more than 2 hours.
Make ahead
Make the dip up to 2 days ahead and keep it covered in the fridge.
How long leftovers keep, and freezing and reheating: leftovers and storage.
Quick answers
- Can I make it ahead?
Make the dip up to 2 days ahead and keep it covered in the fridge. It tastes even better the next day.
Answered from this recipe's own storage, make-ahead and swap notes.
Estimated nutrition per serving
- Calories
- 190 790 kJ
- Protein
- 2 g
- Carbohydrates
- 6 g
- Fiber
- <1 g
- Sugars
- 3 g
- Fat
- 18 g
- Saturated fat
- 7 g
- Sodium
- 250 mg
Whole recipe, 8 servings: about 1,510 calories.
Estimate from USDA FoodData Central; not medical or dietary advice. Based on 11 of 11 ingredients.
How we estimate
We add up USDA FoodData Central values for each measured ingredient as written and divide by the recipe's 8 servings, so changing the servings or units here doesn't change a serving. Brands, swaps, trimming and cooking all change the real numbers.
Not counted: potato chips (to taste or as needed).
Estimated cost
About $0.50 a serving
About $4.10 for the recipe as written (8 servings).
Estimate; prices vary by store and region. U.S. average prices for September 2026 from BLS Average Price Data and USDA ERS Purchase to Plate prices updated with the BLS Consumer Price Index. Priced: 8 of 11 ingredients, 99% by weight.
How we estimate
Each measured ingredient is weighed as in the nutrition estimate and priced at the U.S. average: BLS's average price where BLS publishes one, else USDA ERS's Purchase to Plate price for 2017-18 raised to September 2026 with the CPI for that food group. Whole packages, store brands, sales and regions all change the real cost: treat it as a ballpark.
- sour cream $1.85 ERS
- yellow onions $0.95 ERS
- fresh chives $0.45 ERS
- mayonnaise $0.35 ERS
- butter $0.25 BLS
- olive oil $0.20 ERS
- Worcestershire sauce $0.05 ERS
Free: water (tap water).
Not priced (no official average price we can match, so not in the total): kosher salt, garlic powder, black pepper.
Not counted: potato chips (optional, or to taste).
More dishes for less: cheap eats.
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Gear for this recipe
- See price on Amazon: 12-inch stainless skillet (opens Amazon)
- See price on Amazon: Wooden spoons (opens Amazon)
- See price on Amazon: 8-inch chef's knife (opens Amazon)
- See price on Amazon: Large cutting board (opens Amazon)
- See price on Amazon: Nesting mixing bowls (opens Amazon)
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Cleanup score 4/5 (easy cleanup): 2 things to wash, stainless skillet, mixing bowl.
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