With a 1907 variation.
A similar recipe appeared in the December 4, 1907 edition of Lansing, Michigan’s Mower County Transcript:
Cocoa cookies–Cream half cup of butter with three-fourths cup of sugar. Add one beaten egg and one-fourth cup of sweet milk. Sift together with two cups of flour, one-fourth teaspoonful of salt, two teaspoons of baking powder, four teaspoons of dry cocoa, and one teaspoon of cinnamon. Combine wet and dry mixtures. Bake 15 minutes in hot oven.
From the box of A.D. from Lutz, Florida, by way of Pennsylvania in the 1940s, and originating in Ohio in the 1920s.
4 Tbsp. shortening
1 cup sugar
1/4 cup milk
2 cups flour
3 tsp. baking powder
1/4 tsp. salt
1/2 cup cocoa
Cream shortening and sugar, add milk and beaten egg, mix well. Add flour, baking powder, cocoa and salt.
Roll out 1/4 inch thick on floured board and bake in moderate oven 12 minutes.