Stick of butter cut into slices
Soften Butter By Hand Quickly With This Trick
Softening butter in the microwave can result in a liquid mess, while letting it sit at room temperature can take too long. For a quicker way, just grab a plastic bag.
Simply put your stick of butter in the plastic bag, making sure to get out all of the air before you close it. Then use your fingers to squeeze, pinch, and mash it.
The heat from your hands will help it to soften naturally. Since you are smashing and mashing it, you'll end up getting right to the core of the butter stick.