Preparation Steps

• Preheat oven to 350 degrees F (175 degrees C). Line baking sheets with parchment paper.
• In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.
• Beat in the egg yolk and vanilla extract until well combined.
• In a separate medium bowl, whisk together the all-purpose flour and salt.
• Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
• Roll the dough into 1-inch balls and place them on the prepared baking sheets, about 2 inches apart.
• Using your thumb or the end of a wooden spoon, make an indentation in the center of each cookie.
• Fill each indentation with about 1/2 teaspoon of jam or preserves.
• Bake for 10-14 minutes, or until the edges are lightly golden brown. The centers may look soft.
• Let the cookies cool on the baking sheets for a few minutes before transferring them to a wire rack to cool completely.