First spray your 9x13 baking dish with cooking spray.
Mix the cream cheese with the powdered sugar and vanilla extract.
Then tear the croissants into pieces and layer half into the baking dish. Sprinkle berries on, put dollops of the cream cheese mixture in nooks and crannies, and dollops of the jam throughout. Then layer on the rest of the croissants, berries, cream cheese mixture, and jam.
Mix the eggs with the milk, cream, and vanilla and pour over top of the croissants. Push down and chill in the refrigerator for at least 2 hours (overnight is best).
When ready to bake pre-heat oven to 350 degrees, melt butter and pour over top of croissant bake, then sprinkle with brown sugar. Bake for 40-45 minutes until set and golden brown
Serve with maple syrup, powdered sugar, or a vanilla glaze.