Preheat oven to 425°F and line a baking sheet with foil or parchment. Place an oven rack on the lowest level.
Cut each croissant in-half horizontally, but not all the way through
8 large croissants
Place each croissant on the baking sheet and liberally sprinkle the inside of each with chocolate chips.
12 ounces chocolate chips
Very lightly sprinkle the inside with flaky salt.
1 teaspoon flake sea salt
Close the top of each croissant and lightly brush the tops with maple syrup then sprinkle them with turbinado sugar.
3 tablespoons pure maple syrup, ¼ cup turbinado sugar
Place the baking sheet in the oven on the lowest rack and bake for 4-5 minutes or until the tops are golden brown and have caramelized. Watch the croissants closely beginning at 4 minutes. They can burn quickly at this point.
Transfer the croissants to a cooling rack and cool for 1 minute. Remove them from the tray to cool. These are delicious warm or cold.