In a large bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking powder, and granulated sugar until well combined.

In another bowl, beat the eggs and add milk, melted butter, and vanilla extract. Mix until smooth.

Gradually pour the wet ingredients into the dry mixture, stirring gently until just combined.

Preheat your waffle maker according to the manufacturer's instructions.

Pour an appropriate amount of batter into the preheated waffle maker. Cook for 3-5 minutes or until golden brown.

Let the waffles cool briefly, then decorate with whipped cream, drizzle chocolate sauce, and add sprinkles and berries.