Related Clues:
- Cookie bestseller
- Lunch box treat
- Black-and-white cookie
- Sandwich treat
- It may be dunked
- Cookies 'n' cream component
- Nabisco best seller
- Double Stuf, for one
- Double Delight snack
- Black and white cookies
- Nabisco nibble
- Cookie jar denizen, maybe
- Cookie often eaten inside out
- Subject of Weird Al Yankovic's 'The White Stuff'
- Store-bought cookie