Butternut Squash Bisque with Sage Brown Butter

Silky roasted squash soup finished with a sage brown butter drizzle. Teaches the purée soup method and the liaison technique.

Ingredients

• 1 large butternut squash (about 2.5 lbs), halved and seeded
• 2 tbsp olive oil
• 1 large onion, diced
• 2 cloves garlic, minced
• 1/2 tsp ground nutmeg
• 1/4 tsp cayenne pepper
• 4 cups vegetable or chicken stock
• 1/2 cup heavy cream
• Salt and white pepper
• For the sage brown butter:
• 3 tbsp unsalted butter
• 8-10 fresh sage leaves
• Flaky sea salt

Method

1. Preheat oven to 400°F. Place squash halves cut-side down on a lined baking sheet. Roast 40-45 minutes until completely tender when pierced with a knife. Scoop out the flesh (discard skin). You should have about 3 cups.

2. While squash roasts, heat olive oil in a large pot over medium heat. Add onion and cook 6-7 minutes until soft and translucent. Add garlic, nutmeg, and cayenne. Cook 1 minute.

3. Add roasted squash and stock. Bring to a simmer and cook 10 minutes to meld flavors.

4. Purée the soup using an immersion blender (or in batches in a regular blender — leave the lid slightly ajar to vent steam). Blend until completely smooth with no chunks.

5. Return to low heat. Stir in cream. Season with salt and white pepper. The soup should be velvety and coat the back of a spoon.

6. Make the sage brown butter: Melt butter in a small skillet over medium heat. Once it foams, add sage leaves. Cook, swirling the pan, until butter turns golden brown and smells nutty (about 3 minutes). The sage will crisp up. Remove from heat immediately — brown butter goes from perfect to burnt in seconds.

7. Ladle soup into warm bowls. Drizzle sage brown butter over each bowl and place 2-3 crispy sage leaves on top. Finish with flaky salt.

What You're Practicing

What You're Practicing

Purée soup technique: This is the cleanest way to make a thick, creamy soup without any flour or roux. The starch in the squash provides natural body. Roasting the squash first (rather than boiling) concentrates its sugars and removes excess water, resulting in a more intense flavor.

Immersion blender safety: When blending hot soup, keep the blender head fully submerged to avoid splashing. Move it slowly through the pot. If using a countertop blender, never fill it more than half full with hot liquid, and hold the lid down with a towel — steam pressure can blow the lid off.

Brown butter (beurre noisette): Brown butter is one of the most useful techniques in cooking. The milk solids in butter toast when heated past the foaming stage, creating a nutty, caramel-like flavor. The window between brown and burnt is about 30 seconds, so watch the color and smell carefully. Pull it off heat the moment it turns golden — residual heat will continue browning.

The cream addition: Adding cream at the end (rather than cooking it into the soup) preserves its fresh dairy flavor and prevents it from reducing and becoming heavy. Stir it in gently and never boil after adding.