Spook kids and adults alike with these devilishly delicious chocolate cupcakes that are made with Dutch-processed cocoa powder. Decorate them like a very scary monster...if you dare.
Preheat oven to 350 degrees. Line 2 standard muffin tins with paper liners. Whisk together flour, cocoa powder, sugar, baking soda, baking powder, and salt in a medium bowl.
Mix in eggs, water, buttermilk, oil, and vanilla until smooth, about 3 minutes. Divide batter evenly among prepared muffin tins. Bake, rotating tins halfway through, until tops spring back when lightly touched, about 20 minutes. Let cool in tins on wire racks.