Step 1

Cook butter in a small skillet over medium heat until it foams then browns (be careful not to let it burn), about 5 minutes.

Step 2

Quickly transfer butter to a small bowl, scraping in browned solids. Let cool.

Step 3

Chill brown butter 10 minutes. Stir to distribute solids. Continue to chill, stirring every 10 minutes, until butter starts to solidify.

Step 4

Stir in lemon zest, lemon juice, hot sauce, and salt. Transfer to a piece of plastic; roll into a log. Freeze 1 hour before using.