Preheat the oven to 350 degrees F (175 degrees C). Spray a fluted tube pan or Bundt pan with nonstick spray.

Combine brownie mix, cake mix, cold coffee, oil, and eggs in a large bowl; beat with an electric mixer until well combined. Pour into the prepared pan.

Bake in the preheated oven until a toothpick inserted into center comes out clean, 50 to 60 minutes. Cool on a wire rack for 10 minutes. Run a table knife around edges to loosen. Invert carefully onto a serving plate or cooling rack. Let cool, about 30 minutes.

Heat whipping cream for ganache in the microwave until hot, 2 to 3 minutes. Add chocolate chips and stir until melted.

Pour ganache over cooled cake.