Originally Posted by lyndalou
Thanks. I will use my insulated gravy boat to keep it warm. There are going to be too many people in that kitchen for me to try to make it there. She loves a big crowd.
Here's what I would suggest.
If you have access to a microwave at the host's house, you can actually make Hollandaise easily without a stove and very little counter space. Before you go to your dinner, separate your eggs and put the yolks into a tupperware container. Put your butter into a separate tupperware container. You can keep them in the fridge at the host's house, along with the lemon.
When dinner is close to ready, melt your butter in the microwave. While that's doing its thing, whisk the yolks and lemon juice together. Then keep right on whisking while drizzling the melted butter into it to form an emulsion.
It doesn't take any more than a few minutes. If you have a stick blender, it's even quicker.