Place the chocolate chips in a microwave-safe bowl. Microwave in 20-second intervals, stirring between each interval, until melted and smooth. Set aside to cool.
4 ounces Semi-sweet chocolate chips
In a separate bowl, whisk together the powdered sugar and black cocoa powder to remove any lumps.
3½ cups Powdered sugar, ⅔ cup Black Cocoa Powder
In a large mixing bowl or the bowl of a stand mixer, beat the softened butter until light and fluffy, about 1 minute.
1 cup Butter
Gradually add the powdered sugar and cocoa mixture, about 1 cup at a time, mixing on low speed until incorporated. Scrape the bowl as needed.
Add the cooled melted chocolate and mix until combined.
Add 1 tablespoon of coffee and 1 tablespoon of milk. Beat until the frosting is smooth and creamy. If needed, add more liquid, 1 teaspoon at a time, until the frosting is easy to spread or pipe.
1 tablespoon Coffee, 1 tablespoon Milk
Frost the completely cooled cupcakes using a knife or piping bag fitted with a #2D tip. Add sprinkles immediately so they stick to the frosting.
Black sprinkles, Halloween sprinkle mix