Chilled Sweet Potato and Leek Vichyssoise

By AislePrompt Editorial · Published 2026-06-03 · Updated 2026-06-03

A velvety cold soup featuring sweet potatoes and leeks simmered and pureed with cream and herbs for a smooth and comforting summer dish. This French soup recipe (vegetarian), ready in about 45 minutes, pairs sweet potatoes, leeks, and unsalted butter for a weeknight-friendly dinner. Each serving lands at about 190 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Build a week of meals around this recipe" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 2 medium (about 1 lb) sweet potatoes, peeled and diced into 1-inch cubes
• 2 large leeks, white and light green parts only, thinly sliced
• 2 tbsp unsalted butter
• 4 cups chicken broth
• 1/2 cup heavy cream
• 1 tsp fresh thyme leaves
• 1 tsp salt
• 1/2 tsp black pepper
• 1/2 cup cold water

The stock pot we’d simmer this in → Best Stock Pots for 2026: Top Picks + Buying Guide

Instructions

1. Step 1: In a large saucepan over medium heat, melt 2 tablespoons unsalted butter until foaming.
2. Step 2: Add 2 large thinly sliced leeks and sauté for 5 minutes until softened and fragrant but not browned.
3. Step 3: Add 2 medium peeled and diced sweet potatoes, 4 cups chicken broth, 1 teaspoon salt, 1/2 teaspoon black pepper, and 1 teaspoon fresh thyme leaves.
4. Step 4: Bring to a boil, then reduce heat and simmer for 20 minutes until the sweet potatoes are very tender.
5. Step 5: Remove from heat and let cool slightly, then transfer the mixture to a blender in batches.
6. Step 6: Add 1/2 cup heavy cream and 1/2 cup cold water to the blender and puree until completely smooth and creamy.
7. Step 7: Chill the soup in the refrigerator for at least 2 hours before serving cold.