Use an electric mixer to beat butter on medium speed until fluffy. Add honey, confectioners’ sugar, vanilla and cinnamon (if using) and beat on low speed until combined. Taste and season with additional honey or salt, if desired. Serve immediately or cover and refrigerate for up to 2 weeks.
Notes
Start with softened room temperature butter in order to achieve that light, fluffy, whipped texture.
For smooth, spreadable honey butter, allow the butter to sit out at room temperature for at least 1 hour before serving.
Don't omit the confectioners' sugar -- it gives the honey butter a really smooth, creamy texture.