This recipe is adapted from Pierre Herme's Chocolate Covered Crunchy Hazelnut Cookies from his book "Chocolate Desserts". They are really a cross between a cookie and a candy. My husband definitely thinks they are candy and he loves them. When you bake these cookies they spread a little. So I cut off the excess gave it a whirl in my food processor and sprinkled this on top of the cookies/candy after dipping them in tempered chocolate. They are really yummy and worth making.
HAZELNUT COOKIES/CANDIES
INGREDIENTS
1 Tablespoon Instant Espresso
1 Tablespoon Boiling Water
3 Large Egg Whites (room temperature)
400g Powdered Sugar (sifted)
400g Blanched Hazelnuts (toasted and coarsely chopped)
METHOD
1. Dissolve the instant espresso into the water and set aside to cool.
2. Put all of the ingredients into a stainless steel bowl and set this over a pan of simmering water. Heat the batter, stirring until it reaches 138 degrees.
3. Pour into spacer bars 8" X 12". Batter should be about 1" thick. Cool to room temperature.
4. Cut the block of cooled batter into 3/4" squares and place them on parchment lined baking sheets about 2" apart.
5. Bake at 275 degrees in a convection oven for 18 - 22 minutes turning, half way through the baking time. When done the cookies should be golden, dry and uniformly dull. Remove from oven and cool to room temperature.
6. Dip the cookies in tempered chocolate and sprinkle a little of the *hazelnut dust on top of the chocolate. Put the cookies in the refrigerator for about 10 minutes to set the chocolate then store them at room temperature in an airtight container.

