01 -
Pre-heat oven to 350°F (180°C). Spray or grease and flour an 8-9 inch (20-23 cm) round cake pan or 7-inch (18 cm) bundt pan.
02 -
In a bowl, melt the butter and dark chocolate in either a bain marie or microwave. Allow to cool to room temperature.
03 -
Pour the cooled chocolate mixture into a mixing bowl. Add sugar and beat until combined. Add eggs one at a time, followed by the egg yolk, mixing well between each addition.
04 -
Add the ricotta cheese, vanilla extract, and salt. Beat until the batter becomes light and airy.
05 -
Sift the flour and baking powder into the wet mixture, then beat until smooth (about 2 minutes).
06 -
Pour the batter into the prepared pan.
07 -
Bake for 25-35 minutes or until a toothpick inserted into the center comes out clean or with only a few crumbs. Let the cake cool for 20 minutes in the pan.
08 -
Transfer the cake to a wire rack to cool completely. Dust with powdered sugar before serving.