Macaroons
Oil or butter for greasing parchment rounds
1 cup plus 2 tablespoons (225 grams) granulated sugar
6 large egg whites
2 1/2 cups hazelnuts (about 12 ounces or 340 grams), toasted, then skinned as much as possible*
1/4 teaspoon table salt
1 teaspoon (5 ml) vanilla extract**

Chocolate filling
6 ounces (170 grams or the equivalent of 1 cup chips) bittersweet chocolate, coarsely chopped
1/4 cup water
1 teaspoon instant coffee or espresso granules (optional)

Whipped frosting and filling
1 1/2 cups chilled heavy or whipping cream
3 tablespoons granulated sugar
1 tablespoon Frangelico or another hazelnut liqueur or 1 teaspoon vanilla extract**

Decoration
A semi- or bittersweet chocolate bar for shaving (optional)