Preheat your oven to 350°F (175°C) and grease two round cake pans.
In a large mixing bowl, combine flour, sugar, cocoa powder, baking powder, baking soda, and salt.
In another bowl, whisk together eggs, milk, oil, and vanilla extract.
Gradually add the wet ingredients to the dry ingredients, mixing until combined.
Slowly pour in boiling water, stirring until the batter is smooth.
Divide the batter evenly between the prepared pans.
Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then transfer to wire racks to cool completely.
For the frosting, melt chocolate chips with heavy cream, stirring until smooth, then frost the cooled cakes.
Decorate with chocolate shavings if desired before serving.