Creating this delightful Berry Croissant Bake is simple if you follow these steps:

1. Preheat your oven to 350°F (175°C) and lightly grease a 9×13 inch baking dish.
2. Tear the croissants into bite-sized pieces and evenly distribute them in the prepared dish.
3. In a bowl, combine the mixed berries, gently folding them into the croissant pieces.
4. Whisk together the eggs, milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt in another bowl until well combined.
5. Pour the custard mixture over the croissant and berry layers, ensuring even coverage.
6. Allow the mixture to soak for about 15 minutes, pressing down occasionally to ensure the croissants absorb the custard.
7. Bake in the preheated oven for 40-45 minutes or until the top is golden and set.
8. Once baked, remove from the oven and let it cool slightly before dusting with powdered sugar.
9. Slice and serve warm, either as is or with a dollop of whipped cream or vanilla ice cream.

By following these steps, you will create an incredible Berry Croissant Bake that everyone will adore!