In large mixing bowl combine flour, sugar, buttermilk, eggs, baking soda, salt, and vanilla and beat until well mixed
In 1 qt. sauce pan combine water, butter, and cocoa powder and bring to a boil
Pour liquid mixture into flour mixture. Beat until smooth—batter will be thin. Put ¼ cup of batter into each muffin cup (lined). Do not over fill! Bake at 350 for 20 minutes. Cool on wire rack.
Yields 18 cupcakes