Preheat the oven to 350 F. Line a 12 cup muffin pan with paper liners. In a large bowl, whisk together flour, sugar, cocoa powder, salt, and baking soda. Add in the eggs, melted butter, and vanilla extract, and mix until smooth.
Evenly divide the batter between the paper liners. Bake for 15-20 minutes. Let cool completely. Pipe icing onto each cup in a mummy pattern. Top with candy eyes.