Preheat the oven to 325 degrees and grease a bundt pan with cooking spray. Set aside.
In a stand mixer or with a hand mixer, mix together cake mix, pudding mixes, water, oil and eggs until just combined.
Stir in the ¾ cups of chocolate chips if you're using them and put batter into the prepared bundt pan.
Bake for around 1 hour or until a cake tester comes out clean. Check it at 50 minutes, because it can go a little faster depending on your oven. Cool completely.
When the cake is cool, heat ½ cup heavy cream in a small pan stirring continuously until it's just beginning to simmer (it’ll be steaming).
Pour cream over 1 cup of chocolate chips and let it sit for a 1-2 minutes, then keep whisking until it turns into a silky, smooth ganache.
Let the ganache sit for a couple minutes to thicken slightly and then pour over the cake and top with sprinkles if you'd like. Serve immediately.
