Fifteens (Northern Irish Digestive Biscuits and Marshmallows With Cherries)

Place digestive biscuits in a zip-top bag. Using a rolling pin, pound biscuits until finely crushed (some larger pieces are okay). Transfer to a large bowl. Add cherries and marshmallows. Pour over condensed milk and stir until well combined and the crushed cookies, cherries, and marshmallows are thoroughly coated in condensed milk. Serious Eats / Robby Lozano Overlap 2 pieces of plastic wrap on a clean work surface to form an 18- by 15-inch rectangle with the long edge facing you. Sprinkle 1/3 cup of the desiccated coconut in a 12- by 4-inch rectangle in the center of the plastic wrap rectangle. Using a silicone spatula, scrape biscuit mixture on top of the coconut. Using the plastic wrap to squeeze and shape, carefully roll biscuit mixture into a tight 12- by 3-inch log. Sprinkle remaining 1/3 cup desiccated coconut all over the shaped cookie log, pressing to adhere until the log is fully coated. Tightly roll up log with the plastic wrap. Wrap with another layer of plastic wrap, twisting the ends to seal. Chill until firm, at least 4 hours or up to 3 days. Serious Eats / Robby Lozano Remove log from refrigerator, and unwrap. Slice log crosswise into 15 slices. Serve. Serious Eats / Robby Lozano