A classic Hollandaise sauce, made foolproof and easy with your steam oven. Buttery and rich, we’re going to make this Hollandaise by low-temp steaming the ingredients in a jar. Blending at the end creates the silky smooth texture that’s the hallmark of a perfect sauce.
Preheat your steam oven to Steam setting, 167°F/75°C (100% humidity).
Add all the ingredients to a pint (500ml) sized jar. Screw on the lid to just finger-tight, meaning only as far as you can screw it on with just your fingertips. Any tighter and you run the risk of the jar cracking once it heats up.
1/2 cup unsalted butter, 4 egg yolks, 2 tbsp lemon juice, 1/2 tsp fine salt, 2 tbsp water
When the oven is ready, add the jar and cook for 30 minutes.
At the end of cooking, remove lid from the jar and blend the contents with an immersion blender until smooth and thickened, about 2 minutes. Serve immediately or hold for later (see notes).
Notes
This makes about a cup of sauce, enough for 8 portions for dipping or pouring over a dish.
After blending you can keep the sauce warm, covered, in the steam oven, using the same settings you cooked it on. It should keep without splitting for around half an hour.
To make ahead of time, prepare the recipe as written, then refrigerate the lidded jar for up to 4 days. Reheat to the cooking temp for 30 minutes. You may need to blend again if the sauce has split while reheating.