1. Preheat the oven to 350°F (180°C). Line a baking sheet with baking parchment. Slice the croissants horizontally in half and place them on the baking sheet. Set aside.

2. Add the butter to a microwave-safe bowl and melt in the microwave. Let cool slightly. In a large bowl mix the flour with brown sugar, baking powder, and salt. Add the melted butter and vanilla extract and mix to combine. If the dough is still too crumbly, add a little milk. Add the chopped chocolate and fold in.

3. Using a cookie scoop*, place two portions of dough on the bottom side of each croissant and spread it a little with a spatula. Close the croissants with the top and then pile more cookie dough on top of the croissants. This works best if you press some dough flat between your fingers and then place it on top of the croissants. If desired, press some chopped chocolate into the dough (optional).

4. Bake the croissants for 16-18 minutes – the cookie dough on top of the croissants should have gotten some color but not look dry. Remove from the oven and let cool down (min. 20 minutes). The chocolate chip cookie croissants taste best when they are still slightly warm.