To make the coffee flavor a little more intense you could mix a couple spoonfuls of instant coffee into the batter of the cake.
What other recipes have you used coffee in? We would love to hear about them!
Would you prefer to not have any coffee leftovers to worry about what to do with? Then you might be interested in the Cuisinart Single Serve Coffee Maker:
Or you can keep in mind the Melitta Coffee Makers: