Rinse and dry scallops patting the outside with a paper towel, salt and sprinkle with pepper. Melt the butter in a frying pan and add the olive oil as well.
Transfer the scallops to the pan and fry them for 2-4 minutes (baby = 2, large = 4). Turn the scallops to the other side and fry them for another 2-4 minutes.
They are done when the color is opaque, there is a light brown caramelized color on top and bottom and are still easy to slice.
Transfer the seared scallops to a plate. Drizzle with lemon juice and sprinkle with lemon zest before serving. Additionally, you can drizzle the scallops with melted butter.