Preheat the oven to 350 °F (180 °C) and line a baking sheet with a piece of parchment paper.
In a large mixing bowl, mix together the melted coconut oil, maple syrup, hazelnut butter and vanilla. Set aside.
1/4 cup (56 grams) refined coconut oil, 1/3 cup (79 ml) maple syrup, 1/4 cup (64 grams) hazelnut butter, 1 teaspoon vanilla extract
In a medium mixing bowl, stir together the hazelnut flour, coconut flour, salt and baking soda.
1 cup + 3 tablespoons (133 grams) hazelnut flour, 2 tablespoons (14 grams) coconut flour, 1/4 teaspoon salt, 1/2 teaspoon baking soda
Add the dry ingredients to the wet and stir until thoroughly combined.
Stir in the chocolate chips and hazelnuts.
1/2 cup (85 grams) semi-sweet chocolate chips, 1/3 cup hazelnuts
Place the sugar in a small bowl.
Roll the dough into 1" balls and roll in the sugar.
3 tablespoons sugar
Place on the prepared cookie sheet about 2" apart. There's no need to flatten the dough balls.
Bake the cookies for 10 minutes or until firm on the top. They may crackle a little and will be very delicate but firm up as they cool.
Cool completely on the baking sheet and then place in an airtight container.
Store for up to 4 days at room temperature.