Butter Cake with Boiled Frosting

A Vintage Photos Theme Park photo for the theme of someone's in the kitchen.

Seven students and two teachers pose for the camera during a cooking class in a school kitchen. Judging by the recipes visible on the chalkboard, the subject of the day's lesson was "Butter Cake" with "Boiled Frosting" (see a cropped version of the photo for a close-up of the recipes).

This is an unused real photo postcard with an Azo stamp box (four corner triangles with two pointing up and two pointing down) on the other side, which suggests a date as early as 1917 to 1930.