I got this
chocolate chip cookie recipe straight from Otto and used Otto's own cassava flour for it, as there's reportedly a big difference between the grind of different brands. The cookies are grain-free, nut-free, gum-free, and I made them dairy-free with Miyoko's vegan butter. And they're shockingly good for all that! Crisp on the edges, soft in the middle, not a speck of grit, and they hold together perfectly even without any gums.
I used my stand mixer to cream the block of softened vegan butter into the sugar, then followed the recipe exactly, scooping the dough with a #40 disher (~1.5 tablespoons) and cooking it for 10 minutes. Unchilled, the dough spreads a reasonable amount in the oven, giving you a round, thinnish cookie. From the fridge, the chilled dough takes more like 12 minutes and doesn't spread out quite as much, which I prefer. The dough also freezes well, but I thawed it out in the fridge before baking. If you're cooking from frozen, they'll probably need an extra couple of minutes tacked on. If you're using real butter, cooking times and cookie spread will vary.
When eating these warm from the oven, there's a slightly weird flavor, which must be all the cassava flour. I preferred the taste after they'd cooled, even on into the next day or two. The recipe seems to suggest you should underbake the cookies to ensure they're soft in the middle, but I recommend actually baking them, since that distracting flavor is worse if the dough is undercooked. If you like your cookies crisp all the way through, just give them an extra two minutes in the oven, and they'll stay nice and crispy for days.
If I make these again I might experiment with swapping out a little of the cassava flour for a higher protein flour like oat or millet, just to make them more hearty, but if this recipe suits your dietary needs, it's fantastic as written.