Chocolate Ganache Cake

When you read through this book, you will find that I use this versatile chocolate ganache filling in half a dozen recipes, varying the percentage of chocolate, adding different flavorings, and molding the filling in several shapes. The filling is quick and easy to prepare, and any leftovers can be stored in the refrigerator for weeks. Using the surplus filling is, in fact, the reason I started making this cake.

To make two smaller cakes, 7 inches (17.5 cm) in diameter, make half th