Ingredients
- 200 g unsalted butter
- 3 tbsp white wine vinegar
- 3 tbsp dry white wine
- 1 shallot finely chopped
- 3 fresh tarragon sprigs or 2 tbsp dried
- 3 egg yolks
- Salt
- Pepper
Method
Step 1: Make Brown Butter
Start by making the brown butter. In a small saucepan, heat the butter over medium heat. As the butter melts, it will start to foam. Keep cooking and frequently stirring until the butter turns a nutty brown colour and you can smell a nutty aroma. Remove from heat and set aside to cool.
- Brown butter is ready when it turns a deep golden brown colour and emits a nutty aroma. The solids in the butter will also become browned and settle at the bottom. Keep a close eye, as it can go from browned to burnt quickly.
Step 2: Make Reduction
In another small saucepan, combine the vinegar, wine, chopped shallot, and the tarragon sprigs. Bring this to a boil over medium-high heat and let it simmer until the liquid is reduced to about two tablespoons.
Step 3: Strain
Strain the reduction into a bowl, pressing on the solids to extract as much liquid as possible. Discard the solids.
Step 4: Whisk
In a heatproof bowl, whisk the egg yolks lightly. Then whisk in the strained reduction.
Step 5: Create Sabayon
Set the bowl over a pot of simmering water, ensuring that the water doesn’t touch the bottom of the bowl. Whisk the egg yolk and reduction mixture continuously until it becomes frothy and doubles in volume. This is your sabayon.
Step 6: Add Brown Butter
Begin to add the brown butter slowly, whisking constantly, until all the butter is incorporated. Be sure to leave behind the milk solids at the bottom of the saucepan with the brown butter.
Step 7: Season
Remove it from the heat once all the butter is incorporated and the sauce has thickened. Season with salt and freshly ground pepper to taste.
Tweaks
- Tweak the Herbs Tarragon is the traditional option for flavouring bearnaise but you could try parsley, chervil or thyme
- Add Warmth A pinch of ground nutmeg or allspice is a great way to give bearnaise a subtle warmth that’s not overpowering
Storage
- In the Fridge Place it in an airtight container where it can last for up to 2 days. Before using again, gently reheat it in a saucepan over low heat.
- In the Freezer Put it in a freezer-safe container or ice cube tray. It can be kept for up to 1 month. Thaw in the fridge overnight and gently reheat on the stove, stirring constantly.