Creamy Roasted Asparagus Soup with Lemon, Thyme & Parmesan
This creamy roasted asparagus soup is silky-smooth, brightened with lemon zest, and finished with savory Parmesan and fresh thyme. Roasting the asparagus first adds deep flavor, while a touch of cream (or coconut milk) makes it luxuriously comforting—perfect for spring dinners or a light but satisfying lunch.
Servings 4 servings
Calories 210kcal
Cost $9 for entire recipe
Equipment
- Baking sheet
- Parchment paper or silicone baking mats
- Large soup pot or Dutch oven
- Immersion blender (or high-speed blender)
- Cutting board
- Chef’s knife
- Measuring cups and spoons
- Wooden spoon or spatula
- Zester (for lemon)
Ingredients
Soup Base
- 1½ lbs fresh asparagus woody ends trimmed
- 1 medium yellow onion chopped
- 3 cloves garlic smashed
- 2 tbsp olive oil
- ½ tsp salt
- ¼ tsp black pepper
To Build Flavor
- 1 tsp fresh thyme leaves or ½ tsp dried
- ½ tsp crushed red pepper flakes optional
- 3½ cups vegetable broth or chicken broth
- ½ cup heavy cream or full-fat coconut milk
Finishing Touches
- Zest of ½ lemon
- ¼ cup finely grated Parmesan cheese
- Salt & pepper to taste
Optional Garnishes
- Crispy prosciutto or bacon bits
- Croutons or grilled sourdough cubes
- Extra Parmesan shavings
- Drizzle of olive oil or lemon cream
Instructions
Roast the asparagus
- Preheat oven to 400°F (200°C). Toss asparagus with olive oil, salt, pepper, onion, and garlic. Spread on a baking sheet and roast for 20–25 minutes until tender and lightly caramelized.
Simmer the soup
- Transfer roasted vegetables to a large pot. Add thyme, red pepper flakes, and broth. Bring to a gentle simmer and cook for 5–10 minutes.
Blend until smooth
- Use an immersion blender (or carefully transfer to a blender) and blend until silky smooth.
Finish it off
- Stir in cream, lemon zest, and Parmesan. Taste and adjust seasoning with salt and pepper.
Serve warm
- Ladle into bowls and top with your favorite garnishes.
Notes
- Roasting = flavor: Roasting the asparagus, onion, and garlic first adds a subtle sweetness and depth that simmering alone can’t achieve. Don’t skip this step.
- Cream swaps: Heavy cream makes the soup ultra-silky, but half-and-half, whole milk, or full-fat coconut milk all work well.
- Vegan option: Use coconut milk or cashew cream and replace Parmesan with nutritional yeast or white miso.
- Texture control: For a rustic soup, blend only half and leave some pieces intact.
- Brighten it up: Lemon zest is key—add it at the end so the flavor stays fresh.
- Extra greens: A handful of spinach or kale can be added before blending without overpowering the asparagus.
- Make it heartier: Add white beans, potatoes, or a swirl of Greek yogurt for more body.
- Storage: Refrigerate up to 4 days. Freeze without cream for best texture; add dairy after reheating.
- Reheating tip: Warm gently over low heat to prevent separation.