This cake celebrates Elizabeth's unique blend of science and cooking, echoing her precise measurements and experimental spirit in the kitchen.
Preheat oven to 350°F.
Grease and flour a 9x9 inch baking pan.
Mix flour, sugar, cocoa powder, baking powder, baking soda, and salt in a bowl.
Add buttermilk, coffee, oil, and vanilla. Mix until smooth.
Pour into prepared pan and bake for 25 minutes or until a toothpick comes out clean.
Cool before serving.