Grandma Pat’s Shortbread Recipe

I asked my mom for any recipes that have been passed down/recipes that she did not learn from a book, but learned from others. She emailed me the following recipe, which is my paternal grandma’s recipe. My grandma is from Old Kilpatrick, Scotland (she moved to Canada, and eventually the United States, in her 20s), and shortbread is a Scottish specialty. I don’t like shortbread unless my grandma has made it, and anyone I know who has tried her shortbread says it’s the best they’ve ever had. Ironically, my grandma is absolutely terrible at making any other food, and she always has been; shortbread is her one dish. I was there when my grandma taught it to the two of us, going along as she went. She didn’t have the recipe written down and couldn’t write it down from memory, as she goes through the motions automatically. Although I collected this from my mom, she collected it from my grandma, so here is her information:

Nationality: Scottish
Primary Language: English
Other language(s):
Age: At the time of collection, 87
Occupation: Homemaker
Residence: Old Kilpatrick, Scotland, UK
Performance Date: December 14, 2015

The following recipe is what my mom wrote down from that experience, on December 14, 2015.

1/2 cup butter
1/2 cup sugar
2 cups flour
Knead sugar and butter together with hands.
Add flour, continue kneading.
Press into cookie sheet with your knuckles. Make fork marks on top.
Bake @360 degrees F, 40-45 minutes until edges are lightly browned.
Cut immediately into fingers, okay to leave in pan (important to cut quickly!).
Sprinkle sugar on top!
Learned from Aunt Mary who sponsored her to come to Canada/Denver, 1952.