1. Melt 2 tablespoons of Plugrá Butter in a medium skillet over medium-high heat. Add onion and cook until caramelized, about 12-15 minutes.
2. Stir in Worcestershire sauce. Remove from skillet and cool completely.
3. In a mixer, whip 1 pound Plugrá Butter on high speed until smooth and light.
4. Add in onion, cheese, thyme, pepper and salt; stir by hand until well combined.
5. Shape into two logs of equal size using parchment or wax paper. Refrigerate until firm (about 2 hours), slice into rounds as needed or transfer to plastic wrap to store.