Ingredients
What does 70 percent cacao mean?
The short answer. A chocolate labeled 70 percent cacao is 70 percent cocoa solids and cocoa butter by weight, with the remainder mostly sugar.
Higher numbers mean more bitterness and less sweetness. Dark chocolate around 70 percent is common in desserts like molten chocolate cake because it balances sugar and depth.
Use a bar you would enjoy eating, since few ingredients hide the quality of the chocolate.
Question
Can I use chocolate chips?
Chips contain stabilizers that keep their shape, so they melt less smoothly. A chopped bar works best.