6 tbsp butter
100 g dark chocolate callets
1 cup flour
1½ tsp baking powder
1 tsp espresso powder
1/4 tsp salt
3/4 cup sugar
1/3 cup milk
To make the waffle batter, melt the chocolate and butter in a double boiler. Whisk until smooth and shiny. Remove and let cool.
Whisk together the flour, baking powder, espresso powder and salt in a large bowl.
Whisk together sugar, eggs and milk in a separate bowl until smooth, and then whisk in the cooled chocolate mixture until well combined.
Using a waffle iron, pour the batter into the centre and spread towards the edges.