Bake-At-Home Sourdough Croissant Instructions
How to proof: Before going to bed put the frozen pastries about 2 inches apart on a parchment lined baking sheet. Cover them with plastic wrap and tea towel loosely. Place pastries somewhere that stays 20 c. to proof for about 12 hours. If they haven't risen fully it's because it's too cold, in which case they'll need more time to rise.
Your pastries should double in size like the photo below.
In the morning, preheat oven to 450 f.
Place pastries in the oven on the center rack and turn the oven down to 375 f.
Bake for about 22 minutes or until golden brown all over, including the bottom. Let cool on the pan for 10 minutes before serving.