You can use whatever chocolate chips you have.
Made these muffins and they were perfect. Tried them again today with some more sugar and they didn't turn out looking as lovely Any advice to make them sweeter? - 06 Apr 2011
Made several times for bazaars, went like hot cakes! - 24 Jun 2017
Followed recipe and used normal chocolate drops instead. The actual mixture didn't rise in oven as I used a fan oven at 190C. Overall taste, extremely crunchy but had to cook a little longer . - 19 Jan 2013