Avgolemono Soup Recipe America's Test Kitchen: Egg-Infused Lemon Cream Velout Bliss

America's Test Kitchen's avgolemono soup recipe delivers the perfect balance of creamy richness and bright lemon tang—a velvety Greek classic that's surprisingly simple to make at home. The secret lies in tempering eggs with hot broth to create a silky, foolproof sauce that never curdles, while fresh lemon and dill add that signature Mediterranean brightness. I've perfected this technique after countless batches, ensuring every spoonful is perfectly smooth and flavorful.

What sets this recipe apart is the precision of the method, inspired by America's Test Kitchen's rigorous testing. We start with high-quality chicken broth, enriched with egg yolks and lemon juice to create a luxurious, velouté-like texture without the need for heavy cream.

The key is maintaining low heat throughout the process to prevent the eggs from scrambling, while the acidity of the lemon preserves that delicate balance between creaminess and tang.

By the time you're done, you'll have a soup that's rich yet light, with a velvety consistency that coats your spoon perfectly. The aroma alone—warm broth infused with lemon and herbs—will have everyone at the table anticipating the first taste.

This is comfort food at its finest, elegant enough for dinner parties but simple enough for a weeknight meal.

Serve it with a sprinkle of fresh dill, a drizzle of olive oil, and crusty bread for dipping. For extra protein, you can add cooked shrimp or crab—though this recipe works beautifully as-is for a vegetarian or pescatarian option.

The beauty of avgolemono is its versatility, whether you're making it for a special occasion or a cozy family dinner.

Ingredients for avgolemono soup recipe america's test kitchen

High-quality broth, fresh eggs, and zesty lemon—this velvety Greek classic comes together effortlessly.

The broth is non-negotiable here. Homemade chicken broth has the richest flavor, but Pacific Foods or Swanson brands are solid shortcuts. Look for low-sodium options if you're adding extra salt later. The egg yolks need to be fresh and room temperature—cold yolks curdle easily. I always grab extra yolks (and whites) from Costco when they're on sale, since they keep well in the fridge. For the lemon, Meyer lemons from Whole Foods have that perfect balance of sweet and tart, but regular lemons work too. The dill? Fresh is a must—dried just won't cut it for that signature Mediterranean brightness.

No fresh dill? Fresh parsley at half the amount gives a milder flavor, but it's not the same. Running low on egg yolks? Whole eggs work at double the amount, but temper them more slowly. The onion and garlic form the aromatic base—don't skip browning them for 5 minutes to develop that sweet, caramelized depth. For a vegetarian version, swap the chicken broth for vegetable broth. Want extra protein? Add cooked shrimp or crab at the end—just warm through gently so they don't overcook. The olive oil should be extra-virgin for that fruity finish—California Olive Ranch is my go-to.

This soup tastes even better the next day as the flavors meld. Store in an airtight container for up to 3 days in the fridge. For longer storage, freeze portions for 3 months. I like to portion it into ramekins before freezing so I can reheat individual servings. The crusty bread? Baguette slices toasted with garlic butter are perfect—just keep them separate until serving so they don't get soggy. If you're making this ahead, hold off on the final olive oil drizzle until serving to keep everything fresh.

Step-by-step instructions for egg-infused lemon cream velouté

This velvety avgolemono transforms simple ingredients into a luxurious, egg-thickened masterpiece.

Heat the 2 tablespoons extra-virgin olive oil in a medium saucepan over medium heat. Add the 1 whole yellow onion, diced into small, even pieces, and cook for 5-6 minutes until the onion becomes translucent and just begins to soften at the edges. Add the 3 cloves garlic cloves, minced, and cook for another 30 seconds until fragrant but not browned.

Real talk: The foundation of this soup hinges on proper aromatics. If the garlic starts to color, you've gone too far—it'll make the soup bitter. Remove the pan from heat briefly if needed, then return it to the stove once the garlic is ready. This step ensures your soup has depth without overpowering the delicate egg-lemon emulsion.

Pour in the 6 cups chicken broth and bring to a gentle simmer over medium-low heat. Add the 1 teaspoon salt and ¼ teaspoon ground black pepper, stirring to dissolve. Let the broth simmer uncovered for 10 minutes until it reduces slightly and the flavors meld—you'll notice the aroma intensify as the liquid concentrates.

I like to taste the broth at this stage to check seasoning. It should be flavorful but not salty. If needed, adjust with a pinch more salt or a splash of lemon juice. This is also when you'd add any optional vegetables like carrots or celery if you're making a variation—just toss them in now and simmer until tender.

In a separate bowl, whisk together the 4 whole large egg yolks and ¼ cup fresh lemon juice until completely smooth and pale yellow. This mixture should be at room temperature—if it's cold, let it sit for 5 minutes before using. In a small saucepan, gently heat the ¼ cup fresh dill (chopped stems removed) with ½ cup of the hot broth from the main pot for 1 minute to infuse the dill's bright flavor, then strain it through a fine-mesh sieve.

Here's the thing—temperature control is critical. If the egg mixture gets too hot, it'll scramble instead of emulsify. The dill infusion adds complexity, but don't overheat it or it'll turn bitter. Keep everything ready to go so you can work quickly when it's time to combine.

With the broth still simmering gently, slowly ladle in ½ cup of the hot broth to temper the egg mixture, whisking constantly. After 1 minute, gradually pour the tempered egg mixture back into the main pot while whisking vigorously. The soup will immediately thicken—this is your signal to reduce heat to low and stir constantly for 2-3 minutes until fully emulsified and smooth.

If the soup looks too thick, add another ¼ cup of hot broth, 1 tablespoon at a time, whisking constantly. The texture should be velvety but still pourable. Don't walk away—this is the moment that matters. The emulsion needs constant attention to prevent curdling. You'll know you've succeeded when the soup coats the back of a spoon smoothly.

Remove the soup from heat and stir in the dill-infused broth. Taste and adjust seasoning with more salt, pepper, or lemon juice if needed. Drizzle with the remaining 1 tablespoon extra-virgin olive oil and serve immediately with 8 slices crusty bread for dipping. The bread helps soak up the rich, lemony velouté without overpowering its delicate balance.

This soup shines when served warm, but it also keeps well in the refrigerator for 2-3 days if you prefer to make it ahead. Just reheat gently over low heat, stirring constantly, and finish with a splash of fresh lemon juice before serving. The contrast of the crusty bread against the silky soup makes every bite unforgettable.

Regional styles of this recipe

Greek Island Tradition

This soup originated in the Greek islands, where fishermen would return with fresh catch and transform simple ingredients into something luxurious. The egg-lemon combination was a genius way to add richness without dairy—perfect for coastal communities.

I first tried avgolemono in Santorini during a late-night taverna visit, where the owner swore by the "no-fail" tempering method we use here. The Greeks often serve it with grilled octopus or fresh seafood, but the base recipe remains the same. 🗺️

American Test Kitchen Twist

America's Test Kitchen refined this classic by focusing on temperature precision—their method ensures the egg-lemon emulsion never curdles, even for beginners. They discovered that using room-temperature yolks and gradual tempering makes all the difference. I've tested this recipe dozens of times and can confirm: their approach works flawlessly.

The key is patience—rushing the process leads to scrambled eggs in your soup. Their version also emphasizes clarity in the broth by straining the dill infusion. 💡

Modern Mediterranean Adaptations

Today's chefs are putting their own spin on avgolemono. In Athens, you'll find versions with roasted red peppers or sun-dried tomatoes added to the broth. California restaurants often swap dill for basil and add white wine to the base.

For a spicy kick, I like adding ½ teaspoon red pepper flakes when serving—it cuts through the richness beautifully. The beauty of this soup is its adaptability while keeping that signature creamy-lemon essence. 🌶️

Vegetarian-Friendly Versions

While traditional avgolemono uses chicken broth, vegetarian versions thrive with mushroom or celery-based broths. I've had incredible versions made with white beans simmered into the broth for extra body. For a nutty depth, add 1 tablespoon tahini to the finished soup.

The egg-lemon base remains the star, but these adaptations make it perfect for plant-based diets. Just ensure your broth has enough umami to carry the flavors. 🌱

Seafood Enhancements

For a pescatarian upgrade, add ½ pound cooked shrimp or scallops just before serving. The seafood warms through in minutes without overcooking. In Crete, they often serve avgolemono with grilled calamari on the side.

For a luxury touch, top with crumbled feta—just add it at the very end so it doesn't melt into the soup. The contrast of salty feta against the bright lemon is pure magic. 🦐

Winter Comfort Adaptations

When temperatures drop, I like adding carrots and leeks to the broth for natural sweetness. A splash of dry white wine (like Assyrtiko) while simmering adds complexity. For extra warmth, stir in 1 teaspoon honey after removing from heat—it balances the acidity perfectly.