Preheat the oven to 350°F (180°C), or 160°C for a fan oven.
In a bowl, sift flour, cocoa powder, baking powder, baking soda, and salt. Set aside.
In a separate bowl, whisk eggs with sugar, oil, yogurt, and vanilla until well combined.
Add the dry ingredients to the wet ingredients, and whisk until combined.
Pour boiling water over the mixture, and whisk until you get a uniform thin batter.
Spray the bundt pan with non stick baking spray, then pour the batter in the pan.
Bake in the oven for 35-40 minutes or until a toothpick comes out clean from the center of the pan.
Remove the pan from the oven, and place on a wire rack for 10 minutes then loosen up the sides with a thin spatula if needed. Invert on a plate and allow to cool completely.
For the ganache, In a saucepan or in the microwave, heat the cream until hot but not boiling. Pour over the chocolate chips and let sit for 2 minutes. Stir well until smooth. If needed, whisk vigorously to bring it together.
Let the ganache cool to room temperature, then pour over the cake and allow it to drip slightly from the sides. Decorate with sprinkles if desired.
Allow to set then slice and serve.