Sweetness Note: ⅔ cup made it sweet enough for our tastes, but ¾ cup will give it that extra sweet oomph and will help keep prevent ice crystals. Keep in mind that the mixture will taste less sweet once it is frozen.
Cookie Note: It can be hard to locate sandwich cream cookies that are gluten-free AND top allergen-free, since most brands contain soy. So I created a quick "cheat" recipe for making your own
Top Allergen-free Better-than-Oreo Cookies.