Preheat oven to 350°F. Lightly grease a 13" x 9" pan.
Evenly spread the fruit in the bottom of the pan. In a large bowl, whisk together the cake mix, pudding mix, and the ginger beer. Mixture will appear lumpy and a bit grainy – that is ok! Pour the batter evenly over the fruit.
Cover with foil and bake for 25 minutes. Uncover and bake for another 25-30 minutes, until golden brown and a toothpick inserted into the center comes out clean. Serve warm or at room temperature.
Notes
I used mixed berries for the fruit, but you can use any frozen fruit you like.