These are sandwich cookies, filled with a double filling of raspberry preserves and white frosting. I'd never had these before, so I don't have anything to compare these to. But these are delicious! Cook time is for one sheet of cookies.
Beat 3/4 cup butter at medium speed of an electric mixture until creamy; gradually add 1/2 cup sugar, beating well. Add the egg and 1 tsp vanilla, beating well.
Combine the flour, baking powder, and salt in a separate bowl. Mix well. Add to the butter mixture, beating well. Stir in the coconut.
Shape the dough into 1 inch balls; place on a lightly greased cookie sheet. Flatten the cookies in a crisscross pattern with a fork dipped in flour. Bake at 350 degrees for 12 to 14 minutes. Cool on wire racks.
For the frosting filling: Beat 1/4 cup butter at medium speed of an electric mixer until creamy; gradually add the powdered sugar, beating well. Add the remaining 1/2 tsp vanilla and milk; beat well.
Spread 1 tsp of the powdered sugar mixture on the flat side of half of the cookies. Spread 1 tsp raspberry preserves on the flat side of the remaining cookies. Place the preserve-topped cookies on top of the powdered sugar mixture-topped cookies to form sandwiches.