Recently for Easter dinner, I made a batch of Hollandaise sauce from scratch to go with the blanched asparagus that was one of the surprises I had planned for my friends and family. I haven’t made it at home or professionally in quite some time but the process came back to me easily and despite forgetting that I had no lemon juice in the house (horrors!), it came out pretty nicely after sending my daughter to the corner market!
It does take a little work to make correctly and to be quite honest, the powdered/packaged variety is a good substitute for most home cooks, but nothing beats freshly made hollandaise.
Check out this article on making hollandaise from scratch: How to Make Hollandaise Sauce!