This Week in America's Test Kitchen: Triple Chocolate Mousse Cake

Recipe research taught the cooks at America's Test Kitchen what they didn't want in their Triple Chocolate Mousse Cake: indistinguishable layers and texture, and a flavor so overpoweringly rich that it's hard to finish more than a few forkfuls. By finessing one layer at a time, starting with the dark chocolate base and building to the top white chocolate tier, the cooks at America's Test Kitchen aimed to create a triple-decker that was incrementally lighter in texture—and richness.

Watch this video for step-by-step instructions or get the recipe at America's Test Kitchen (free registration required).