Instructions

1. Preheat the oven to 350. Line 2 baking sheets with parchment paper.
2. In the bowl of a food processor, combine the hazelnuts, flours, sugar, and salt and pulse until nuts are very finely ground. Add the butter evenly over mixture and pulse again until dough just begins to come together.
3. Transfer to a lightly floured board and continue working the dough with your hands until dough is cohesive. (If dough is too dry, add 1 tablespoon of water at a time to help dough come together.)
4. Taking one tablespoon of dough at a time, form dough into balls and space them at least 1/2-inch apart on the prepared baking sheets. Use your thumb to create an indent in the middle of each cookie and fill each well with a heaping 1/2 teaspoon of jam.
5. Bake for 10-12 minutes, until the edges of the cookies darken slightly. Transfer cookies to a wire rack to cool and then store in an airtight container.