German Green Sauce, or Grüne Soße, is a beloved Frankfurt specialty that earns its bright, vibrant flavor from a generous blend of seven fresh herbs. The combination of creamy sour cream and yogurt creates a lush, tangy base that lets the herbs shine without overwhelming the palate. Each herb contributes something distinct: chives bring mild onion warmth, parsley adds grassy brightness, sorrel delivers a pleasant lemony tartness, and borage lends a subtle cucumber freshness. Served cool, it pairs beautifully with boiled potatoes, hard-boiled eggs, or grilled fish and chicken, making it a refreshing and elegant sauce for warm spring and summer meals.

Ingredients

The traditional Frankfurt version uses exactly seven herbs. If you cannot find all seven, substitute with what is available.

Seven Herbs

• 1 small bunch fresh chives
• 1 small bunch fresh flat-leaf parsley
• 1 small bunch fresh sorrel
• 1 small bunch fresh borage
• 1 small bunch fresh garden cress or watercress
• 1 small bunch fresh chervil
• 1 small bunch fresh salad burnet (Pimpinelle)

Base

• 1 cup sour cream
• 1/2 cup plain full-fat yogurt
• 2 tablespoons mayonnaise
• 1 tablespoon white wine vinegar or fresh lemon juice
• 1 teaspoon Dijon mustard
• 1 teaspoon sugar or honey
• Salt and white pepper to taste

Optional additions

• 2 hard-boiled eggs, finely chopped or grated, stirred in or served alongside
• 1 small shallot or 2 tablespoons finely minced white onion

Directions

1. Wash all herbs thoroughly and dry them well using a salad spinner or paper towels. Remove any tough stems.
2. Finely chop all herbs by hand or pulse them briefly in a food processor. You want a fine mince, not a puree. You should have approximately 1 to 1.5 cups of loosely packed chopped herbs total.
3. In a medium bowl, whisk together the sour cream, yogurt, mayonnaise, vinegar or lemon juice, mustard, and sugar until smooth and well combined.
4. Fold in the chopped herbs and stir until evenly distributed throughout the creamy base.
5. If using, stir in the finely chopped hard-boiled eggs and minced shallot.
6. Season generously with salt and white pepper. Taste and adjust the vinegar or lemon juice for brightness as needed.
7. Cover the bowl and refrigerate for at least 1 hour before serving to allow the flavors to meld and the herbs to fully infuse the sauce.
8. Stir once more before serving and adjust seasoning if needed.

Tips and variations

• Herb sourcing: Sorrel, borage, chervil, and salad burnet can be harder to find. Check farmers markets, specialty grocery stores, or grow them from seed. In a pinch, spinach can substitute for sorrel, and tarragon or dill can fill in for chervil.
• Lighter version: Replace the sour cream with full-fat Greek yogurt and omit the mayonnaise for a lighter, tangier sauce.
• Vegan version: Use dairy-free sour cream, coconut yogurt, and vegan mayo. The herb flavor will still shine through beautifully.
• Make ahead: This sauce actually improves after sitting overnight in the refrigerator. Make it the day before for best flavor.
• Classic Frankfurt serving: Serve chilled alongside halved hard-boiled eggs, boiled new potatoes with their skins on, and a cold Riesling or Apfelwein (German apple wine).
• Grilled pairing: Excellent spooned over grilled salmon, trout, or chicken thighs.
• Storage: Keeps well refrigerated for up to 3 days. Do not freeze.
• Metric equivalents

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