LIL LEFTYS Infused- Grape Cookies 🍪 Flavors Grape Ammonia Flowery. Grape Cookies offers smokers what might be described as a “creeper” of a high, taking as many as 10 to 15 minutes to reveal its effects. As the high sets in, the user may note inexplicable feelings of euphoria and positivity. Under the right circumstances, Grape Cookies can cause both couch-lock and sleep. For these reasons, the strain is best enjoyed at night. Grape Cookies can also have therapeutic value for medical cannabis patients. Its sedation can soothe aches and pains, whether they’re temporary, as due to injury, arthritis or chronic conditions.