The trick here is to incorporate the liquid into the butter. Add the softened butter to a small mixing bowl - you'll need more room than you think. Whisk butter until it is light. Add ½ to 1 teaspoon of butter and vigorously whisk to incorporate. Repeat until all the soy sauce is incorporated. If not using immediately, cover and refrigerate. The butter will keep in the refrigerator for a couple weeks.
Recipe by Grilling Outdoor Recipes powered by Bull Outdoor Products at http://www.grillingoutdoorrecipes.com/sriracha-honey-glazed-pork-bahn-mi/