4 boston cream chocolate ganache Recipes

unsalted butter, at room temperature, divided, mashed ripe bananas (about 6 medium bananas), sour cream, eggs, pure vanilla extract, cake flour, sugar, divided, baking soda, baking powder, salt, pastry cream , recipe follows, chocolate ganache , recipe follows, heavy cream, divided, sugar, divided, vanilla bean , split lengthwise in half and seeds scraped out, seeds and bean reserved, egg yolks, cornstarch, heavy cream, semisweet chocolate, chopped (about 3 1/4 cups)

unsalted butter, at room temperature, mashed ripe bananas (about 6 medium bananas), sour cream, eggs, pure vanilla extract, cake flour, sugar, baking soda, baking powder, salt, pastry cream , recipe follows, chocolate ganache , recipe follows

cake flour, sugar, baking powder, salt, milk, cooking oil, egg yolks, vanilla, egg whites, cream of tartar, pastry cream , recipe follows, ganache , recipe follows, whole, 2 percent fat , or 1 percent fat milk, vanilla bean , split lengthwise, seeds scraped out, egg yolks, granulated sugar, cornstarch, unsalted butter, semisweet chocolate, heavy cream, boiling