1. In a medium bowl, combine the flour and salt. Set aside.

2. In the bowl of a stand mixer, combine the butter, sugar and vanilla extract. Beat on medium speed until light and fluffy.

3. Add the flour mixture and mix until combined. Turn out dough onto a sheet of wax paper and wrap up. Refrigerate for 1 hour.

4. Preheat the oven to 350 degrees. Line a baking sheet with parchment paper.

5. Scoop dough into 1-inch balls and place 2 inches apart on the prepared baking sheet.

6. Using your thumb, press down two overlapping indents to create a heart shape. Fill each cookie indent with ¼ teaspoon of jam.

7. Bake for 15 minutes or until the cookies are lightly browned. Remove from the oven and allow to cool on the baking sheet for a few minutes before transferring to a wire rack to continue cooling.