1. Preheat oven to 350° F.
2. In a small sauce pan melt butter and chocolate chips over low-medium heat. Stir until smooth. Set aside.
3. In a large mixing bowl, whisk cocoa powder, flour, baking soda, baking powder and salt until all ingredients combine. Set aside.
4. In a separate large mixing bowl, whisk eggs, sugars, vanilla until smooth. Whisk in chocolate/butter mixture until combined.
5. Gradually add half the flour and half the buttermilk, add remaining flour mixture then remaining buttermilk. Whisk in between additions. The mixture will have a pudding-like consistency.
6. Line a cupcake tin with cupcake liners and scoop 2 tablespoons of cupcake batter in each liner. Bake for 20 minutes or until a toothpick inserted, comes out clean.

For Frosting – Makes 2 cups

1. In a medium microwaveable bowl melt butter. Stir in cocoa.
2. With an electric hand mixer, alternately add powdered sugar and milk until desired consistency.
3. Frost cupcakes and decorate with Halloween sprinkles.