Also, our house is cold, arctic vortex and all. The kitchen is definitely not in the typical range of what might be considered "room temperature." Fortunately, I found a great reddit thread with alternative ideas for proofing. There was still some ambient heat lingering in the oven from when I heated our Chicken Shawarma Bowl, so I started the proofing process in the semi-warm oven. I waited about four hours and no visible proofing had occurred. Some folks on the thread said that if the product has been in your freezer for a significant amount of time, they won't proof correctly, but fortunately they also said the product is still delicious even if it hasn't risen like it's supposed to.
And you know what? They were absolutely right. These pastries might not have been as puffy as they were intended to be, but they sure did taste good. There's a richness to the bread that's absolutely marvelous, just like Trader Joe's other frozen croissants. The chocolate flavor is velvety and indulgent, sweet but not overly so, and the whole conglomeration is flaky and buttery as can be.
$5.49 for four bakery-quality croissants. Kosher. Would buy again in warmer weather just to try them when proofed correctly. Four and a half stars a piece from Sonia and me for Trader Joe's Double Chocolate Croissants.
Bottom line: 9 out of 10.