Pastry Chef Online: How to Think Like a Pastry Chef
How to Think Like a Pastry Chef

Ganache--The Amazing Multi-tasker
In its simplest form, ganache is an emulsion of equal parts of chocolate and heavy cream. Small amounts of corn syrup or are sometimes called for in some recipes. By varying the proportion of chocolate to cream, or the temperature, you can vary the texture of the finished product. Increase the cream to make a ganache that, when chilled, you can whip like cream. Increase the chocolate and you get a truffle filling. Pour it warm over a cake and you have a thin glaze, or pour it over ice cream, and voilà: a simple chocolate sauce. Use it to sandwich cookies together. Or cakes. Or meringue discs. Possibilities are nearly limitless. Ganache can be made with dark, milk or white chocolate, but make sure that you use high quality chocolate. With only two basic ingredients, inferior chocolate can't be camouflaged.
Proportion rules for dark chocolate:
1 part cream to 3 parts chocolate=glaze
1 part cream to 2 parts chocolate=truffle center
1 part cream to 1 part chocolate=filling.
Proportions will be different for white and milk chocolates, and because they contain milk solids, they can be a bit temperamental and more susceptible to breaking.