Here was the happy result:
We let each guest decorate her own cupcake.
Here I chose chocolate frosting with coconut.
And here's how to do it:
2. Cool the dissolved cocoa mixture in a pan of cold water. Place in the freezer to speed cooling.
3. Meanwhile, grease or line a muffin tin. In a large mixing bowl, pour yellow cake mix, eggs, oil, and cooled cocoa and water mixture. Blend batter and bake cakes according to package instructions.
This idea is linked to Works For Me Wednesday at We Are That Family.