This recipe is either a label or a clipping from packaging of some kind (possibly from a package of Solo prune filling). It’s pretty splattered in places and seems to have been a well-used recipe. Date unknown. Kolacky is a type of pastry with fruit filling, you can see pictures here: Wikipedia. Recipe is typed below along with a scanned copy.

“SOLO” PRUNE KOLACKY

1 12-ounce can Solo Prune Filling
1 1/2 cups all purpose flour or 2 cups cake flour
1 cup (1/2 lb.) salted butter
1 tablespoon milk
1 large (8 oz.) cake Philadelphia cream cheese
1/2 teaspoon baking powder
1 tablespoon sugar
1 egg yolk

Sift flour and baking powder. Cream butter with cream cheese, milk and sugar. Add beaten egg yolk. Add flour mixture. Knead into a smooth dough. Roll out to 1/8″ or 1/4″ thick as desired and cut with cookie cutter into 2″ rounds. Place on ungreased cookie tin and make a depression with thumb or spoon in center of each round. Add 1 teaspoon Solo Prune Filling into each center. Pre-heat oven to 400° and bake Kolacky for 10 minutes until slightly brown. Confectioner’s sugar may be sprinkled on top before serving. You can also use Solo Poppy, Apricot, Almond, Date, Raisin or Pineapple filling and each will be delicious.