Scandinavian Cookies

3 qts. unsweetened pineapple juice Juice of 8 lemons or 1 6-oz. can frozen concentrated lemon juice diluted with water according to direction on can Juice of 8 oranges or 1 6-oz. can frozen concentrated orange juice diluted with water according to directions on can 1/2 cup sugar 1 cup mint leaves 1 pint fresh…