Cold sauces & condiments
Kokkteilsósa
Kokkteilsósa · A cold, pale-pink Icelandic condiment built from sour cream (and/or mayonnaise) thinned with ketchup and finished with sweet mustard (sætsinnep). It is Iceland's preferred accompaniment to french fries and virtually all deep-fried fast food, and functions as a reusable base component rather than a finished plated dish.
The formula
200 g dairy base : 3 tbsp ketchup : ½–1 tsp sweet mustard
Dairy base is either 200 g sour cream alone, or a 50/50 split of 100 g sour cream + 100 g mayonnaise. The two-source foundation ratio comes from the icecook.is blog (Sjöfn Kristjánsdóttir); a different published variant by Nanna Rognvaldardottir uses 1 cup mayo + 4 tbsp ketchup + 1 tbsp pineapple juice + 1 tsp paprika + ¼ tsp Tabasco.
Identity
- Cold condiment / dipping sauce
- Pale-pink emulsion (color comes from ketchup)
- Icelandic fast-food staple since the 1960s
- Reusable base preparation, not a finished plated dish
- Family of pink mayo-ketchup sauces (fry sauce, golf sauce, salsa rosa)
Ingredients
| Base | Sour cream | Either 200 g alone, or 100 g combined with 100 g mayonnaise; provides tang, body, and the dairy foundation. |
| Fat | Mayonnaise | Optional — replaces half the sour cream when a richer, more stable emulsion is desired. |
| Flavor | Ketchup (tómatsósa) | Adds tomato acidity, sweetness, and the signature pink color; ~3 tbsp per 200 g dairy base. |
| Seasoning | Sweet mustard (sætsinnep) | ½–1 tsp; provides the sweet-spicy note that distinguishes Icelandic kokteilsósa from plain fry sauce. |
Method
- 1Measure the dairy base — 200 g sour cream, or 100 g sour cream plus 100 g mayonnaise.Establishes the creamy foundation; both single- and split-dairy versions are canonical Icelandic practice.
- 2If using both sour cream and mayonnaise, whisk each one separately until smooth before combining.Prevents lumps from forming in the finished sauce — explicitly called out in the source recipe.
- 3Fold in approximately 3 tablespoons of ketchup until the sauce turns a uniform pale pink.Ketchup contributes color, sweetness, and tomato acidity while loosening the dairy into dip viscosity.
- 4Stir in ½–1 teaspoon sweet mustard (sætsinnep) to taste.Sweet mustard is the defining seasoning — it lifts the ketchup-mayo profile into something identifiably Icelandic.
- 5Cover and chill at least 30 minutes before serving; alternatively, blend all ingredients together on high.Resting lets the mustard bloom into the dairy; the blender method is the accepted shortcut when texture is not critical.
Techniques that matter
Separate-then-combine whisking
Mixing each dairy component on its own before merging prevents lumps — the source author flags this as important.
High-speed blender emulsification
Allows dumping all ingredients at once for a smooth result when a perfectly hand-mixed texture is unnecessary.
Variations & derivatives
Nanna Rognvaldardottir's 'Cool Cuisine' versionIceland (published cookbook)
1 cup mayo + 4 tbsp ketchup + 1 tbsp pineapple juice + 1 tsp paprika + ¼ tsp Tabasco + salt and pepper; popularised in Iceland in the 1960s.
Fry sauceUtah, USA (1940)
Closest American cousin; same mayo + ketchup foundation.
Salsa golf / golf sauceArgentina (1920s, attributed to Nobel laureate Luis Federico Leloir)
South American predecessor with the same mayo-and-tomato logic.
Salsa rosaSpain / Italy
Mediterranean relative in the same pink-sauce family.
Used in these dishes
Substitutions
- Sour cream → Greek yogurt (full-fat) — Similar tang and body; will read slightly more acidic.
- Sweet mustard (sætsinnep) → Dijon mustard + pinch of sugar — Recreates the sweet-spicy profile; adjust sugar to taste.
- Ketchup → Tomato paste thinned with a little vinegar and sugar — Workable emergency substitute; will not taste exactly like ketchup.changes result
- Mayonnaise → Crème fraîche — Adds richness without the egg-oil emulsion; loosens body, so reduce slightly.
Troubleshooting
Lumpy, broken-looking sauce
Combining sour cream and mayonnaise without stirring each dairy separately first. → Whisk each dairy component smooth on its own, then fold together gently.
Sauce too runny and ketchup-forward
Too much ketchup relative to the dairy base. → Stir in more sour cream (or a spoon of mayo) until the body returns; re-balance mustard.
Sauce tastes flat or generic
Missing or insufficient sweet mustard. → Add sætsinnep ¼ tsp at a time until the sweet-spicy note reads clearly.
Sauce too pale or too red
Color depends entirely on ketchup dose. → Adjust with more ketchup for a deeper pink or more dairy to soften the hue.