The cookie recipe from inside a novel

The aunt in my novel loves cookies. Here's a recipe from the novel.

Recipe for Aunt Kazuko’s Oatmeal Raisin Cookies (1946) from the new novel, Under the Silk Hibiscus by Alice J. Wisler (Lighthouse Publishing of the Carolinas)

1 ½ cups all-purpose flour
¼ teaspoon salt
1 teaspoon soda
1 teaspoon ground cinnamon
½ cup shortening
1 cup sugar
1 egg
1 ½ cups rolled oats
2/3 cup buttermilk
½ cup chopped nuts
1 cup seedless raisins
Cream shortening, blend in sugar and add egg. Beat until smooth and light. Sift flour with salt, soda and cinnamon. Stir half the flour in with egg mixture; add milk, the rest of flour, and then oats, nuts and raisins. Stir till well mixed. Drop from a teaspoon onto a buttered baking sheet and bake at 400 degrees F. for 10 minutes or until nicely browned. Yields about 36 cookies.

Book blurb for Under the Silk Hibiscus:
During World War Two, fifteen-year-old Nathan and his family are sent to Heart Mountain, an internment camp in Wyoming for Japanese-Americans. Nathan desires to protect the family's gold pocket watch, a family heirloom brought over from Japan. He fails; the watch is stolen. Struggling to make sense of his life in “the land of freedom” as the only responsible man of the household, Nathan discovers truths about his family, God, and the girl he loves. Get a copy of Under the Silk Hibiscus here.