The game won't let me get into the kitchen. I can only go to the dining room or outside. I picked it up in the dining room behind the Major. The first time, I picked it up later in the beginning part of the game. The second time I did it the way the walkthrough stated and picked it up right at the beginning. Both times it wasn't in my inventory when I scrolled through it.
The four food groups: Chocolate, chocolate, chocolate and HOT chocolate.