1-Step One: Prepare the Infused Vinegar Reduction Start by combining the white wine, white wine vinegar, coarsely crushed black pepper, sliced shallot, and tarragon sprigs in a small saucepan. Place the pan over medium-low heat and bring the mixture to a gentle simmer. Let it simmer for 2 minutes, allowing the flavors to meld and the liquid to reduce slightly. Remove from heat and let the mixture infuse for 5 additional minutes, giving the herbs and shallots time to release their essential oils and flavors into the liquid. After infusing, strain the mixture through a fine-mesh sieve into a small bowl. Press down on the solids with the back of a spoon to extract every bit of that flavorful liquid. You should end up with 1 to 1 1/2 tablespoons of infused vinegar. If you have too much liquid, return it to the pan and reduce it further. If too little, you can add a splash of water. Let this cooled reduction sit for about 5 minutes until it reaches room temperature, as adding hot liquid to egg yolks could cause them to scramble.

2-Step Two: Clarify the Butter While the infused vinegar cools, prepare your clarified butter. Place the cubed unsalted butter in a heatproof jug or measuring cup. Microwave in 20-second bursts until completely melted. Let the melted butter stand for 30 seconds, undisturbed. During this time, the milk solids will sink to the bottom and any foam will rise to the top. Carefully pour off the clear golden butterfat into a separate container, leaving behind the white milk solids at the bottom. You should have approximately 3/4 cup of clarified butter. This step is crucial for a stable bearnaise sauce recipe because removing the milk proteins prevents the sauce from splitting. If you’re short on time, ghee makes an excellent substitute as it’s already clarified butter.

3-Step Three: Emulsify the Sauce Now comes the magic moment. In a tall container suitable for a stick blender (immersion blender), combine the 3 room-temperature egg yolks, the cooled infused vinegar reduction, and the salt. Blitz briefly for about 5 seconds to combine everything. With the stick blender running on high speed, begin slowly drizzling in the hot clarified butter. Take a full minute to pour in all the butter, keeping the blender running continuously. This slow addition is what creates a stable emulsion. The mixture will begin to thicken and turn pale yellow, similar to a loose mayonnaise. Once all the butter is incorporated, continue blending for another 10 seconds, moving the blender up and down through the mixture. This extra blending ensures a perfectly smooth, creamy texture throughout the sauce.

4-Step Four: Achieve Perfect Consistency Your sauce will be quite thick at this point, similar to mayonnaise. Add 1 tablespoon of water and blend briefly to incorporate. Check the consistency by lifting the blender and observing how the sauce flows. It should coat the back of a spoon and flow slowly, perfect for drizzling over your perfectly grilled steak. If the sauce is still too thick, add more water, 1 teaspoon at a time, blending after each addition until you reach the desired consistency. The sauce should be pourable but not runny, with enough body to cling to your protein of choice.

5-Step Five: Add Fresh Herbs and Serve Remove the stick blender and stir in the finely chopped fresh tarragon leaves and chervil (or parsley). These fresh herbs add beautiful flecks of green throughout the pale yellow sauce and provide that final burst of fresh flavor that makes béarnaise so special. Your homemade bearnaise sauce recipe is now complete! Serve immediately over your chosen dish, or keep it warm for up to 1 hour by storing it in a pre-warmed thermos. Give it a gentle stir before serving to redistribute any herbs that may have settled.