Preheat oven to 350 degrees F (175 degrees C). Grease a baking sheet.
In a large bowl, cream together the butter and sugar until light and fluffy. Beat in the egg, vanilla, baking powder and salt. Gradually stir in the flour, mixing until a soft dough is formed. Divide dough into 24 pieces.
Roll each piece of dough into a ball and place on the prepared baking sheet. Make an indentation in the center of each cookie with your thumb and fill with 1 teaspoon of raspberry jam. Sprinkle with chopped walnuts.
Bake for 12 to 15 minutes in the preheated oven, or until golden brown. Let cool on baking sheet for 2 minutes before transferring to a wire rack to cool completely.
Interesting Facts
Kolacky is a traditional Czech pastry that has been enjoyed for centuries.
The dough is very versatile and can be filled with a variety of fruits and nuts.
These pastries are popular for celebrations and special occasions.