Ingredients
Metric weights use grams. US weights use ounces; liquids use fluid ounces. Conversions are rounded. Spoon measures use 5 ml teaspoons and 15 ml tablespoons; cups use 240 ml.
Serves 4
Choose any positive whole number of servings. Ingredients and measured amounts in steps scale together. Times, temperatures and equipment stay unchanged. For larger yields, cook separate original-size batches. Counted ingredients can become fractions; beat eggs before dividing them. Fixed correction-water checks remain fixed.
Main ingredients
Liquids
Seasoning and finishing
Equipment
Large saucepan with lid; stick blender; knife; board; spoon.
Check all product labels and cross-contact. Diet groups describe this listed draft, not every substitution.
Steps
Prepare · About 1 min
- Wash 450 g white and pale-green leek carefully between the layers.
Check: Grit can collect inside leeks.
- Slice the leeks thinly.
- Cut 450 g peeled potatoes into cubes about 2 cm wide.
- Heat 50 g butter in the saucepan over medium-low heat.
- Add the potato, leeks and 1 whole chopped onion.
Soften and simmer · About 20 min
- Cover the saucepan.
- Cook for 8–10 minutes, stirring twice.
Check: The vegetables should soften without browning.
- Add 850 ml vegetable stock, ¼ tsp salt and ¼ tsp black pepper.
- Bring the stock to a gentle boil.
- Reduce the heat to low.
- Simmer for 15–20 minutes.
Check: A fork should enter the potato centres easily.
Blend and finish · About 3 min
- Turn off the heat.
- Blend with the stick blender, keeping its blade submerged.
Check: The soup should become smooth without splashing hot liquid.
- Stir in 140 ml whipping cream and 125 ml whole milk.
- Warm over low heat for 2–3 minutes without boiling.
- Serve hot.
Tips
- The yield is for main-course bowls. Wash between the leek layers to remove grit.
Substitutions
- Use unsweetened oat milk instead of dairy if listed.
Storage
- Refrigerate perishable food within two hours, or within one hour in heat above 32°C / 90°F. Store covered at 4°C / 40°F or below. Use within two days for this draft.
- Reheat cooked dishes to 74°C / 165°F, stirring or turning for even heating. Serve cold salads, dips and chilled desserts directly from safe refrigeration.
- For sauces and soups, add a little water if thick and reheat gently. Crisp coatings soften after storage.
Make ahead
- Wash leeks and chop potatoes one day ahead; keep potatoes in water in the fridge.
FAQ
Why wash leeks carefully?
Grit collects between their layers.
Can I leave it chunky?
Yes. Blend only part of the soup.
How should I store potato & leek soup?
Refrigerate perishable food within two hours, or within one hour in heat above 32°C / 90°F. Store covered at 4°C / 40°F or below. Use within two days for this draft.
Recipe source and adaptation
Measured home adaptation: Good Food team: Leek & potato soup (Vichyssoise).
Four main portions rather than eight starters; extra fried-leek garnish omitted.
Food safety references
FoodSafety.gov: cooking temperatures · Food Standards Agency: rice storage and reheating



