Add the softened butter, honey, powdered sugar, and salt to a large bowl (or stand mixer).
Beat on high speed for 5 minutes with a hand mixer (or stand mixer) until light and fluffy. The butter will look thick and wet to start but will whip up nicely.
Cover and store in a bowl or jar on the counter for up to 1 week or in the fridge for up to 1 month.
Notes
You can add ground cinnamon can be added (to taste) to make cinnamon honey butter. I usually start with 1/4 teaspoon once the butter is completely mixed and then add more cinnamon as needed.