Meantime, prepare the chocolate ganache:

• First off, make sure all ingredients are at room temperature.
• Preheat the oven to 200°C/400°F. Place a rack in the center of the oven.
• Brush a 24 medium sized muffin pan with butter then lightly coat it with flour. Shake it well and get rid of the excess flour.
• Cream the butter with an electric mixer on high speed for 30 seconds. Add the sugar, orange flavoring and orange zest and beat for 30 more seconds.
• Add the eggs one at a time and beat for 1 minute.
• Fold in the flour, salt and baking powder and stir well with a wooden spoon.Stir inthe chocolate chips and scrape down the edges of the bowl, making sure thatall ingredients are well combined.
• Spoon the batter into the muffin pan, filling about two third of the cups.
• Bake for 15-20 minutes or until you insert a toothpick in the center of the cake and it comes out clean. Remove from the oven, allow to cool down before transferring to aserving plate.
• Meantime, prepare the chocolate ganache:
• Place the chocolate in a medium bowl.
• In a small heavy saucepan, heat the cream and bring just to a boil.
• Directly pour over the chopped chocolate.
• Stir the sugar and butter. Set aside.
• Allow the ganache to slightly cool down before pouring over the muffins.
• Decorate with mandarin segments (optional)