This is a recipe for espresso-flavored sponge toffee. I put it on my blog (http://bostoncheapeats.blogspot.com/) after trying it out. The bitterness of the espresso is good for countering the sweetness of the sponge toffee. If you have dark chocolate chips or melting chocolate, let the toffee harden and cool, break into pieces, and dip into melted dark chocolate for a more sophisticated treat or gift. Enjoy!