Place the salted butter in a small pan on the stove and heat on medium-low until barely melted, but not boiling hot.
For this step
Salted butter 235 ml
Add the egg yolks and lemon juice to a blender.
For this step
Egg yolk 2
Lemon juice 1 tbsp
Blend on high speed until the egg starts to get creamy.
Slowly stream in the melted butter until all of it is added.
For this step
Salted butter 235 ml