Patricia - I did see that question but unsure how to respond. There is no grating secrets, though I use my new fancy schmancy box grater from William Sonoma. I called it fancy schmancy because it has like 8 different sizes all around it, and it has a cover at the bottom to catch the grated goods. I use one of the smallest size - the chocolate turned out very small like snowflakes.
My theory of why the cupcakes look perfectly flecked is because these babies were baked only 15-20 minutes in the oven (they’re done that fast) - so that the chocolate didn’t have enough time to melt. I don’t know if this is correct, though.
Additional comments: I should also mention that the chocolate I used has been refrigerated for months - maybe that plays a role too.