Jamie is right on this, 1 cup of cocoa butter converts to 218 grams. Adding a whole cup of cocoa powder to just 100 grams of cocoa butter would indeed be overwhelming. I recommend that nobody follow the recipe unless they make sure they measure the cup of cocoa butter AFTER it is melted or use a scale to weigh it to 218 grams, thus avoiding this major error in your conversion rate on the cocoa butter.