For these easier chocolate croissants, we use a store-bought puff pastry sheet instead of making our croissant dough at home. Puff pastry needs to be thawed before being used in our recipe. I take my sheet out of the freezer, place it onto a plate, cover it with plastic wrap, and let it sit in the fridge for a few hours. You can also thaw at room temperature for 40 to 50 minutes.