Cut the butter into small pieces
Grate the butter
Pound the butter with a rolling pin
Place the butter between two sheets of parchment paper
Let the butter sit at room temperature for a short time
Warm a bowl with hot water, dry it, and cover the butter with it
Microwave in very short bursts on low power
Flatten the butter with a warm glass or warm pan
Mix the butter with other softened ingredients
Use a food processor to break it up briefly