These were very easy to make and delicious. I used a ziplock bag to pipe the filling in the middle. I used mini cupcake tins and it was the perfect combination of cake and filling.
This is an incredible recipe, I have been making these for years, without the mini-chips.
The cakes are similar to the giant chocolate muffins with a similar filling I used to purchase at Starbucks.
The recipe, word-for-word is on page 309 of Anne Byrn's book Chocolate from the Cake Mix Doctor (published in 2001, by Thomas Allen and Sons Ltd.).
Absolutely delicious! I didn't have any miniature chocolate chips so I used cinnomon chips instead. It was a great combination. They are my family's new favorite!