Day 9 Solo Kolacky Thumb Print Cookies

These are my husbands and sons very favorite cookie. It is on the label of the Solo can's of fillings. My mother-in-law gave this to me when I was first married. They have not changed the recipe.
1 cup butter or margarine, softened
1 package (8oz) cream cheese, softened
1 Tbsp. Milk
1 Tbsp. Sugar
1 Egg Yolk
1.5 cups all purpose flour
.5 Tsp baking powder
1 can Solo filling (any flavor)
Instructions
Pre-heat oven 400-f
Beat Butter, Cream cheese, milk and sugar in medium-size bowl with electric mixer until thoroughly blended. Beat in egg yolk. Sift flour and baking powder and stir into butter mixture to make stiff dough. Cover bowl and refrigerate 7 hours or over-night.
Roll out dough on lightly floured surface to ¼ thickness, Cut Dough with 2” cookie cutter. Place cookies on ungreased baking sheets about 1” apart. Make depression in center with Thumb or back of spoon. Spoon 1 Teaspoon Solo filling into center of cookie. Bake 10-12 minutes or until lightly browned. Remove from baking sheets and cool completely on wire racks. Sprinkle with confectioners’ sugar just before serving
I just keep putting my fingers in powder sugar and roll them in small balls then I keep putting my thumb in powder sugar to make the thumbprint. I don't bother rolling them out. I use to but they taste the same so why bother.