Preheat your oven to 350°F (175°C) and prepare your cauldron molds.

Whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt in a large bowl until no lumps remain.

In another bowl, mix melted butter, eggs, and vanilla extract until well combined, then gradually add milk.

Combine the wet ingredients with the dry mixture until just combined; a slightly lumpy batter is desirable.

Fill each mold three-quarters full with batter and bake for 20-25 minutes until a toothpick comes out clean.

Cool the cakes in their molds for 10 minutes before transferring them to a wire rack.

Frost your cooled cakes with chocolate frosting and sprinkle with edible glitter.