Preheat the oven to 350°F. Spray a 12-cup Bundt Pan with nonstick cooking spray or use the butter/flour method.
In a large bowl, add cake mix, brownie mix, eggs, water, and oil. Whisk for 2 minutes, or until lumps are mostly gone.
Pour the batter into the prepared bundt pan and bake for 50-55 minutes, checking for doneness at 45 minutes. The cake is done when an inserted toothpick comes out with a few crumbs, but no wet batter.
When done baking, remove the cake from the oven and allow it to cool in the pan for up to five minutes. Then, carefully turn the cake out onto a cooling rack and cool for about 30 more minutes.
Ganache
In a microwave-safe bowl, add whipping cream. Heat for about 2 minutes, or until the cream is just boiling.
Carefully pour the chocolate morsels into the boiling cream; it may rise up and bubble, but this is okay.
Let sit for 5 minutes. Whisk the chocolate and cream until shiny and smooth, about 1 minute.
