• 2 egg yolks
• 1 tbsp of warm water
• 1 tbsp of lemon juice
• 3/4 tsp of salt
• pepper to taste
• 1 stick of butter (110g) , melted to liquid (not too hot)

1) Combine egg yolks, water, lemon juice, salt and pepper in a bowl or pan and use an immersion blender to quickly blend together (or do this in a blender). No need to overblend.

2) Slowly add the melted butter while continuing to blend. Once all the butter has been added, the sauce should have a nice silky texture.