Steps to make the cake:
Preheat your oven to 325 degrees.
Using a hand or stand mixer, beat the butter and sugars together until light and fluffy (approximately 5 minutes).
Next, add the vanilla extract.
Then add the eggs one at a time mixing until combined after each addition.
Mix the flour, baking powder, and salt together. Add the dry mixture to the batter, alternating with sour cream, beginning and ending with the dry mixture.
Lastly, fold the milk chocolates into the batter.
Pour your batter into a 12-cup bundt pan sprayed with baking spray or similar.
Place the cake in your preheated oven and bake for an hour to an hour and 15 minutes. The cake is done when a toothpick inserted comes out clean.
Remove the cake from the oven and allow it to cool for 20 minutes before removing it from the pan.
To make the Chocolate Ganache:
In a microwave-safe dish, heat the heavy cream for about 1 ½ minutes.
Pour the cream over the milk chocolates, but do not stir.
Allow it to sit for 3 minutes to give the chocolate time to soften.
After three minutes, stir until combined and silky chocolate forms.
Pour the chocolate onto the cake as desired and then top the cake with milk chocolate chips.
Allow the chocolate to set, then serve!