We've reviewed at least two other varieties here on this blog. Despite not having any severe gluten intolerants among us, we've sampled dozens of gluten free cookies, pastries, and snacks over the years, and I'd say more than half got a basic thumbs up from our team if not enthusiastic accolades.
What's not working? These cookies aren't dry, but they're not particularly buttery. You could call them "oily" I guess. But they're not smooth or creamy like traditional madeleines. The flavor suffers for want of butter, too. They lack the sponginess of glutenful mads and instead come off as grainy or even gritty in a slightly unpleasant way. The main ingredients are egg, sunflower oil, sugar, and rice flour. It's an odd mouthfeel, and the flavor just lacks that certain something that makes other madeleine cookies special.
$3.49 for six individually-wrapped cookies. Would not buy again. Two and a half stars from me. Three stars from Sonia for Trader Joe's Gluten Free Madeleine Cookies.
Bottom line: 5.5 out of 10.