See post for suggestions and substitutions.
The Belgian Chocolate I used is of superior quality, but it does come in a big pack.
Montezuma's 100% Absolute Black is a good alternative (U.S. link
HERE).
These pretty things will remain solid at room temperature, but I prefer them refrigerated.
The best way to ensure accurate measurement of ingredients is with Metric Kitchen Scales. They are inexpensive and take up very little space. Click
HERE for the ones I use. For U.S. option click
HERE.