Mrs. Danvers' dark chocolate cake reflects her intense and shadowy personality, as well as the foreboding atmosphere she cultivates at Manderley, especially in her interactions with the new Mrs. de Winter.
Preheat oven to 350°F (175°C).
Grease and flour two 9-inch round baking pans.
In a large bowl, whisk together cocoa, sugar, flour, baking powder, soda, and salt.
Add eggs, milk, oil, and vanilla; beat on medium speed for 2 minutes.
Stir in boiling water (batter will be thin).
Pour batter into prepared pans.
Bake for 25-30 minutes, or until a toothpick comes out clean.