You have been steered awry with the lectins. There is literally no scientific evidence that eating lectins in foods, especially in normal amounts, interferes with nutrient absorption. I hope you see a real allergist or dietitian who can help clear this up for you further. The internet can really be an evil thing. I promise you that a tbsp or two of potato starch in a recipe will not hurt you. And btw, lectin containing foods are so nutritious and will help you achieve all your health (and longevity) goals. By leaving them out of your diet you are losing out.
Signed,
Frustrated RD

Amazing! Thanks so much for sharing your experience with those modifications! xo

Yay! Thank you for the lovely review, Karen! We’re so glad you enjoy these cookies! xo

Hi Lisa, tapioca starch would be the next best option, but we haven’t tested it in this recipe ourselves. Let us know if you try it!