Grease and line the loaf pan with parchment paper, or simply grease and flour it.
Preheat the oven to 180°C (350°F).
Melt the chocolate in a double boiler.
In a bowl, whisk together the yogurt and sugar until smooth.
Add the eggs and mix well.
Stir in the oil, then the melted chocolate, mixing after each addition.
Sift the flour and baking powder over the mixture. Stir until smooth, without overmixing.
Pour into the pan and bake for about 55 minutes to 1 hour 15 minutes.
Do not open the oven during the first 45 minutes of baking. Check for doneness by inserting a skewer or the tip of a knife into the center of the cake, it should come out clean.
Unmold the cake onto a wire rack and let it cool before serving.
I hope you enjoy this cake as much as we do at home!