Check out these hazelnut Biscuits with lid!
The biscuit is round with a soft shell that keeps the coffee warm. You can turn it over and soak the top in your coffee, too!
From this book: Sébastien Gaudard: Agitateur de goût Yes, the book and the recipe are in French. The recipe is in the book, and sorry I cannot post it as it is copyrighted. However, you could make your own using a hazelnut cookie recipe like this one. I made curved cookies by using a large muffin pan.
