Preheat oven to 375 degrees. Line cupcake pan with paper cupcake liners. Sift together flour blend, cocoa powder, baking powder, baking soda and salt. Set aside. In large mixing bowl, stir together coconut milk, water and vinegar. Add sugar, brown sugar, oil, and vanilla extract. Slowly whisk in the flour mixture. Beat for 1 minute. The batter will become smooth. Pour batter into prepared cupcake pan. Bake for 16-18 minutes, or until toothpick inserted in center of cupcake comes out clean. Place cupcakes on cooling rack and cool completely.