Preheat oven to 350°F.
In a medium bowl, cream together butter and white sugar until smooth. Mix in 1/2 tsp almond extract, egg yolk, and flour until dough comes together.
Chill dough for 15-30 minutes.
Roll dough into 1 ½ inch balls and place on a cookie sheet lined with parchment paper. Using a spoon, make a small impression in the center of each ball. Fill impression with jam.
Bake for 14-18 minutes in preheated oven, or until lightly browned.
In a medium bowl, mix together confectioners sugar, 3/4 tsp almond exact and milk until smooth.
Drizzle over warm cookies.