Creating Creepy Eyeball Cupcakes is as easy as following these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line a cupcake pan with liners.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until combined.
3. Combine Wet Ingredients: In another bowl, beat the eggs and add milk, vegetable oil, and vanilla extract. Mix well.
4. Combine Mixtures: Gradually stir the wet ingredients into the dry ingredients until combined. The batter will be slightly thick.
5. Add Boiling Water: Carefully mix in the boiling water until the batter is smooth. It will be thin.
6. Fill Cupcake Liners: Pour the batter into prepared cupcake liners, filling them about 2/3 full.
7. Bake: Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
8. Cool Cupcakes: Allow the cupcakes to cool in the pan for 10 minutes, then transfer them to a wire rack to cool completely.
9. Prepare Frosting: In a large bowl, beat the butter until creamy. Gradually add powdered sugar and beat until combined. Add heavy cream and vanilla extract, mixing until fluffy.
10. Frost the Cupcakes: Once the cupcakes are cool, generously frost each cupcake with the white buttercream frosting.
11. Decorate with Eyeballs: Top each frosted cupcake with a candy eyeball, placing it centrally on top of the frosting.
12. Add Finishing Touches: If desired, use red food coloring to create veins around the eyeballs for extra creepiness.

These simple steps will guide you toward creating a batch of Creepy Eyeball Cupcakes that are not only delicious but also excitable to make!