In small bowl, stir together flour, salt, baking soda and baking powder. Beat butter, sugar and brown sugar in large mixer bowl until creamy. Add vanilla; then beat in eggs, one at a time, until well combined. Gradually beat in flour mixture. Stir in chocolate chips and hazelnut meal. Cover and refrigerate at least 2 hours or up to overnight.
Preheat oven to 350 degrees F. Drop cookie dough by 2-tablespoon-fuls onto parchment-lined baking sheets and gently press to flatten slightly. Bake 13 to 14 minutes or until cooked through. Cool on baking sheets for 2 minutes; remove to wire racks to cool completely.
Assemble the sandwiches:
Turn 32 cookies over so that flat sides face up (you may have some extra cookies left over). Place 1/4 cup of gelato onto 16 cookies. Press remaining cookies onto gelato to form sandwiches. Wrap individually in plastic wrap and store in freezer up to 2 weeks.
Notes
Use a cookie scoop to keep your cookies uniform in size and shape.
This website provides estimated nutrition information as a courtesy only. You should calculate the nutritional information with the actual ingredients used in your recipe using your preferred nutrition calculator.