This handwritten recipe came from the same collection as the Vintage Ginger Cookies Recipe [1] that was noted as coming from a 1936 cook book (Robert Shaw Cook Book). Date is unknown. Recipe is typed below along with a scanned copy.
Sour Cream Cookie
Robert Shaw Cook Book 1936
400° – 12 mi.
(I used this for Rolled Out Christmas Cookie)
1 c. sugar
1/2 c. shortening
1 egg
1/2 c. sour cream
1 teas Bak. Soda (mix into little hot water)
3 1/2 c. flour
2 teas Bak Pwdr
Vanilla or lemon Flavor or Nutmeg – 1 teas
Roll out on floured & podwr sugar–board
Cut. Coat cookie with beaten egg white then colored sugar