I made these chocolate ganache cupcakes using this Ina Garten recipe. They have a bit of a coffee flavor and came out really moist. They're definitely worth making a second time.
The ingredients are pretty standard with the exception of the can of Hershey's syrup which makes the cupcakes extra chocolatey and moist.
The recipe makes about 12 but I didn't fill the cups enough and had extra. I used some individual silicone liners and put them in a tin to make it easier to move. This recipe doesn't use any raising agent, so they don't rise when they bake.
The coffee flavor is added in the ganache, but I think it would work to add some to the batter as well for an extra coffee flavor.