Related Clues:

• Two-colored cookie
• It has two colors and three layers
• Cookie used in some Klondike bars
• Ice-cream extra, at times
• Dunking cookie
• Big name at Nabisco
• Crosswords' favorite cookie
• World's best-selling cookie
• Uh-Oh! ___ (Nabisco product)
• Cookies 'n' cream cookie
• Mousse pie ingredient, maybe
• One may be dipped in milk
• Duotone cookie
• ___ Cakesters (Nabisco offering)
• Longtime Hydrox competitor