In a medium bowl, stir together flour, cocoa powder, baking soda, and salt.
In a separate large mixing bowl, mix together sugar, buttermilk, oil, eggs, and vinegar. Add the dry mixture to the wet mixture and beat on medium speed until well blended.
Add vanilla and entire bottle of red food coloring to batter and mix again on low speed until well blended and uniform in color.
Line 2 - 12 cup muffin tins with papers. Fill each paper about 3/4 full with batter. Will end up with 18-20 cupcakes.
Bake at 350 for 20-25 minutes, or until center springs back when pressed lightly with finger. Allow to cool completely before icing.