Preparation 
1. Preheat Oven: Preheat your oven to 350°F (175°C). 
2. Prepare Croissants: Tear the croissants into bite-sized pieces and place them in a greased 9×13-inch baking dish. 
3. Mix Custard: In a large bowl, whisk together the eggs, milk, heavy cream, granulated sugar, vanilla extract, orange zest, and orange juice until well combined. 
4. Assemble Bake: Pour the custard mixture evenly over the croissant pieces, pressing down slightly to ensure the croissants are well-soaked. If using, sprinkle the chopped pecans or walnuts on top. 
5. Bake: Bake in the preheated oven for 35-40 minutes, or until the top is golden brown and the custard is set. 
6. Serve: Let the breakfast bake cool slightly before dusting with powdered sugar if desired. Serve warm and enjoy! 
