This is a rich, chocolate frosting. We call it war frosting because it has so little butter in it, we assumed it came about during rationings. But then, sugar was rationed too, so I have no idea! This is delicious with a nice chocolate taste and good texture. Dont be afraid of the corn starch; it makes this frosting smooth, not slimy, like it tends to do in sauces. It is best used with a 9 x 13 cake, you can pour it over a warm cake. This is not a good frosting for layer cakes.
This is a rich, chocolate frosting. We call it war frosting because it has so little butter in it, we assumed it came about during rationings. But then, sugar was rationed too, so I have no idea! This is delicious with a nice chocolate taste and good texture. Dont be afraid of the corn starch; it makes this frosting smooth, not slimy, like it tends to do in sauces. It is best used with a 9 x 13 cake, you can pour it over a warm cake. This is not a good frosting for layer cakes.
Cooks often dump dry cornstarch directly into boiling water, resulting in stubborn starch lumps that resist dissolution. Whisk the sugar and cornstarch together thoroughly in a dry saucepan before introducing any liquid. This coats the starch granules in sugar crystals, separating them so they hydrate evenly when boiling water hits the pan.
Unsweetened chocolate supplies cocoa solids and cocoa butter, while the single tablespoon of butter adds extra dairy fat for mouthfeel. Without sufficient fat to form a traditional emulsion, this recipe relies on gelatinized starch to hold the mixture together. Heat the saucepan over medium flame, stirring constantly with a heat-resistant silicone spatula to prevent scorching at the base. As the temperature approaches a simmer, the cornstarch granules swell and absorb free water, transforming a watery mixture into a glossy, pourable glaze. Apply this frosting directly to a warm sheet cake within fifteen minutes of cooking, as it lacks the high fat content required to set into a rigid crust upon cooling.