Melt the chocolate chips in a microwave-safe bowl, heating in 20-30 second intervals, stirring in between, until fully melted. Set aside to cool.

In a mixing bowl, beat the softened butter with an electric mixer on medium speed until light and fluffy (about 2-3 minutes).

Mix in the vanilla extract, continuing to beat for another minute.

Gradually add powdered sugar, about ½ cup at a time, mixing well after each addition. Beat until the frosting becomes smooth and fluffy.

Stir in the melted chocolate until fully combined. If the frosting is too thick, you can add a teaspoon of milk to reach the desired consistency.

For a touch of sophistication, sprinkle a pinch of flake sea salt on top before using the frosting on cakes, cupcakes, or cookies.