They crossed girl Scout Cookies and Granddaddy Purple to create Monster Cookies, an indica marijuana strain. This strain has a jarring combination of euphoria and relaxation in its effects. Monster Cookies has a perfume that is dominated by earthy elements with hints of grape and berry. Purple and green hues are braided together under a silver blanket of crystal trichomes, according to growers. Patients who use medical marijuana pick Monster Cookies to help with stress and anxiety problems.