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Best White Choc. for Hand-rolled Truffles/Effects of Cocoa Butter Content on Viscosity

Sorry for the long title but these two topics seem to go hand-in-hand.  I was reading a discussion at another site about firming up a white chocolate ganache recipe.  Someone responded that it's best to use a white chocolate with the highest amount of cocoa butter to get the firmest ganache.  This seems to make sense, however...


At the Callebaut site, their chocolate is rated by drops according to viscosity.  The more drops, the more fluid the chocolate.  When I compare the white chocolate, it appears that the chocolate becomes more fluid as the cocoa butter percentage goes up and the milk solids go down.  Hence, as the cocoa butter percentage drops and the milk solids rise, the chocolate becomes firmer (a lower "drop" rating).


Am I misunderstanding this?  What is the relationship between cocoa butter content and viscosity in white chocolate?  What is the best white chocolate to use to get a ganache that's firm enough to roll and dip?  What ratio of White Chocolate to Cream to Butter is generally used?


Thank you,

Jenny Meyer

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For hand rolled truffles with a white chocolate ganache, I use the following general recipe...
6 parts white chocolate
3/4 part cocoa butter
1 part butter
3 parts liquid (cream or other plus cream)

This looks very liquid and is not something you can pipe into truffles. I use the set and then scoop method. I leave the ganache at room temperature for 8 to 12 hours before scooping with a 1 ounce measure. At that point the ganache is able to be handled. I roll it and dip it. Good luck.
A ganache is an oil in water emulsion. The fat, from cocoa butter or milk will be as dispersed globules in the continuous water phase. So the greatest affect on the rheology will be what is in the water phase, and how much there is. Imagine sand in water, more sand or less water thickens it.

The blend of fats though will also have an effect, but much less. With more milk fat the fat globules will be softer, giving less stand up or firmness. But the water phase and what's dissolved in it has the greatest influence.

While this may be a late answer, part of the question remains unanswered.

The cocoa butter will both increase and decrease your viscosity.

In liquid melted form, it will decrease your chocolate's viscosity or thin it out.

In solid cooled form, as in a truffle's ganache, it will increase the viscosity or make it harder.

& thank you for the recipe Debby. :)


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