Add the chocolate chips or the chocolate you are using to a heat-proof bowl. Melt in a microwave-safe bowl in 20 second intervals, stirring between each, or use a double boiler over simmering water. Once melted, let the chocolate cool to room temperature.
Place room-temperature butter in a mixing bowl. Beat the butter on high speed with a stand or hand mixer for 2-3 minutes until light, creamy, and fluffy.
Add the cooled melted chocolate to the whipped butter. Mix on medium speed until fully combined, scraping the sides of the bowl as needed to ensure the frosting is smooth and creamy.