For ease of reference, here are all the biscuit entries to date:
America
Belarus
Belgium
Aprikozenkoejke (The Elisabeth Biscuits)
The British Isles
The Prince of Biscuits
The Humble Digestive
The Rich Tea Biscuit
The Hobnob
The Chocolate Hobnob
English Jumbles
The Malted Milk
Dark Chocolate Gingers
Almond Thins
Iced Garden Biscuits
Jammie Dodgers
Gingerbread Stars
Lady Fingers
Water Biscuits
Easter Biscuits
Shepherds’ Welsh Biscuits
Chocolate Pearl Biscuits
Shortbread
The Bath Oliver
Baked Apple and Custard Biscuits
Border Lemon Drizzle Melts
The Club Biscuit
Canada
Czech Republic
Linecké Cukroví
Czech Poppy Seed Biscuits
Denmark
Estonia
Finland
France
Bredele
Navettes
Galettes Bretonnes
Macarons
Les Biscuits Roses de Reims
Germany
Greece
Holland
Italy
Zuccherini al Caffe
Grisbi Extreme Cookies
Sicilian Mystery Biscuits
Savoiardi Biscuits
Baci del Chiostro
Japan
Jewish
Latvia
Miscellaneous
The Dog Biscuit
Lemon Moon Biscuits
Florentines
The Biscuit Bestiary 