French Onion Dip from Scratch. A chilled sour-cream dip packed with slowly caramelized fresh onions rather than soup-mix powder. The formula and timing below are working estimates for a future kitchen trial, not a claim that a batch has been made.
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Fresh onions are the point
This dip earns its onion flavor in a skillet. Slow cooking reduces three raw onions to a sweet, concentrated mass before they are folded into cold sour cream.
It is a working recipe, not a completed kitchen trial. Final onion volume and dip yield should be measured so the eight portions make sense.
Brown without scorching
A wide skillet lets moisture leave; a medium-low flame gives onions time to soften before the edges darken. Stir more often late in cooking when sugars cling to the pan.
If onions look black in spots while still firm, reduce heat. Bitterness cannot be repaired by extra sour cream.
Ingredients for 8 appetizer portions
| Ingredient | Amount | Use |
|---|---|---|
| Yellow onions, finely diced | 3 medium onions | Approximately three cups raw. |
| Unsalted butter | 1 tablespoon | Cook onions. |
| Olive oil | 1 tablespoon | Cook onions. |
| Fine salt | 1/2 teaspoon | Quarter teaspoon with onions, remainder to taste. |
| Sour cream | 1 1/2 cups | Cold base. |
| Mayonnaise | 1/4 cup | Rounds texture. |
| Garlic powder | 1/4 teaspoon | Measured seasoning. |
| Ground black pepper | 1/4 teaspoon | Measured seasoning. |
Step-by-step method
- Finely dice three medium yellow onions. Heat 1 tbsp butter and 1 tbsp olive oil in a wide skillet over medium-low heat. Add onions and 1/4 tsp salt.
- Cook approximately 35–40 minutes, stirring more often near the end, until deeply golden and reduced, not burnt. Lower heat if dark spots appear before the mass softens. Cool about twenty minutes.
- Fold cooled onions into 1 1/2 cups sour cream, 1/4 cup mayonnaise, 1/4 tsp garlic powder, 1/4 tsp pepper and remaining 1/4 tsp salt. Cover and chill about forty minutes.
- Stir and portion approximately one-quarter cup per appetizer serving. Record the cooked onion volume and final salt balance in a kitchen test.
Cool the onions first
Warm onions can loosen the dairy base and create condensation in a covered bowl. Give them roughly twenty minutes to cool before folding in.
Mayonnaise adds body and tang, but brings egg unless a specially formulated alternative is used and tested. Do not label this egg-free on the base formula.
Let the dip come together cold
A short refrigerated rest allows the onion to season the sour cream. Stir once before serving and assess whether additional salt is needed only after tasting.
The cool-and-chill hour is included in total elapsed time. It should not be marketed as ready straight from the pan.
Serving and storage
Offer with plain chips or cut vegetables; those dippers are not in the measured yield. Keep the dairy dip cold during a party and refrigerate promptly afterward.
Test overnight flavor and consistency before claiming a specific make-ahead window.
Dip questions
Is there packet soup mix?
No. Fresh onions are caramelized from scratch.
Why not add hot onions?
They can thin the dairy base and change its texture.
Can I skip mayonnaise?
That changes body and tang; trial the alternative before changing the recipe card.
Further reading and related Chefly recipes: Alton Brown onion dip from scratch. These are relevant references and other dishes, not evidence that this proposed formula was tested.
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French Onion Dip from Scratch. Category: Dips. 8 appetizer portions. Prep approximately 15 minutes; cooking approximately 40 minutes; additional cooling/chilling approximately 60 minutes; total approximately 115 minutes excluding preheat. Not kitchen-tested; nutrition not calculated.
Ingredients: 3 medium onions Yellow onions, finely diced; 1 tablespoon Unsalted butter; 1 tablespoon Olive oil; 1/2 teaspoon Fine salt; 1 1/2 cups Sour cream; 1/4 cup Mayonnaise; 1/4 teaspoon Garlic powder; 1/4 teaspoon Ground black pepper.
Instructions: Finely dice three medium yellow onions. Heat 1 tbsp butter and 1 tbsp olive oil in a wide skillet over medium-low heat. Add onions and 1/4 tsp salt. Cook approximately 35–40 minutes, stirring more often near the end, until deeply golden and reduced, not burnt. Lower heat if dark spots appear before the mass softens. Cool about twenty minutes. Fold cooled onions into 1 1/2 cups sour cream, 1/4 cup mayonnaise, 1/4 tsp garlic powder, 1/4 tsp pepper and remaining 1/4 tsp salt. Cover and chill about forty minutes. Stir and portion approximately one-quarter cup per appetizer serving. Record the cooked onion volume and final salt balance in a kitchen test.
Allergens: Milk; Egg (mayonnaise); Check mayonnaise labels. Review packaged ingredients and cross-contact before serving.
Print
French Onion Dip from Scratch
- Total Time: 115 minutes
- Yield: 8 servings 1x
Description
Approximately two cups of caramelized onion and sour cream dip, eight appetizer portions.
Ingredients
- 3 medium onions Yellow onions, finely diced
- 1 tablespoon Unsalted butter
- 1 tablespoon Olive oil
- 1/2 teaspoon Fine salt
- 1 1/2 cups Sour cream
- 1/4 cup Mayonnaise
- 1/4 teaspoon Garlic powder
- 1/4 teaspoon Ground black pepper
Instructions
- Finely dice three medium yellow onions. Heat 1 tbsp butter and 1 tbsp olive oil in a wide skillet over medium-low heat. Add onions and 1/4 tsp salt.
- Cook approximately 35–40 minutes, stirring more often near the end, until deeply golden and reduced, not burnt. Lower heat if dark spots appear before the mass softens. Cool about twenty minutes.
- Fold cooled onions into 1 1/2 cups sour cream, 1/4 cup mayonnaise, 1/4 tsp garlic powder, 1/4 tsp pepper and remaining 1/4 tsp salt. Cover and chill about forty minutes.
- Stir and portion approximately one-quarter cup per appetizer serving. Record the cooked onion volume and final salt balance in a kitchen test.
Notes
Recipe-development draft; not kitchen-tested. Timing and yield are estimates. Nutrition has not been calculated.
Additional chilling, resting or cooling time: 60 minutes, included in the total.
Untested estimate: 35–40-minute onion browning, 20-minute cool and 40-minute chilling; onion water and pan size vary.
- Prep Time: 15 minutes
- Chilling, resting or cooling: 60 minutes
- Cook Time: 40 minutes
- Category: Dips
Nutrition
- Serving Size: Approximately one quarter cup