These are such a great little sweet treat to help keep my exhausted co-workers going. The base is a pretty standard chocolate cake, but the topping was what made these stand out. If I made it again, and I probably will, I think I’d use less batter and more topping per cup. They don’t really rise that much, so even though they looked really full going into the oven I didn’t have any overflow problems.
The only negative was that it took a really long time to fill my mini cupcake pan. It would be a great recipe to enlist the help of a friend in exchange for baked goods.
Busy Lizzy Bakes 
I’m sure you’d have lots of volunteers! Chocolate and walnut is one of my favorite flavor combinations.
You are such a great co-worker. I wish I lived closer. I would be happy to help especially for such a tasty treat.
Looks great! I bet they were some happy co-workers. 🙂