01 -
Get your stand mixer ready with the paddle attachment. On medium, whip the softened butter with brown and white sugars until smooth, light, and fluffy. This should take roughly 3 minutes.
02 -
Pop in the egg and vanilla, then mix slowly at first until it combines. Then let it go for about a minute on medium-high so it blends really well.
03 -
Scrape the bowl’s sides to make sure it’s all getting mixed. Toss in the cornstarch, salt, and baking soda. Let it stir for 30 seconds. Then slowly mix in the flour, a cup at a time, until just blended.
04 -
Carefully mix the chocolate into the dough using a spatula by hand or gently beating on low speed. Just enough to spread it out evenly.
05 -
Set your oven to 350°F (175°C) and line a tray with parchment paper.
06 -
With a serrated knife, carefully cut each croissant in half horizontally, but leave the back hinge attached so it opens like a clam. Put them on the lined baking tray.
07 -
Take about 1/2 cup of cookie dough for each croissant. Put a thin, even layer of dough inside the cut croissant and lightly close it.
08 -
Using the rest of the dough from the 1/2 cup, spread some on both ends of the croissant. Flatten it a bit in your hands, then lightly press it onto the croissant’s outer layer. Do this for all croissants.
09 -
Once all your filled croissants are prepped, bake them for around 10-12 minutes until the cookie dough on top is golden but not too dark.
10 -
Once done, let the crookies cool slightly on the tray before serving. They're best enjoyed warm!