For the Linz cookies, finely grind hazelnuts, knead with honey, flour, butter, cloves, egg, carob and cinnamon to a dough. Chill for a few hours, then roll out and cut out small cookies.
Bake in a heated oven at 175° Celsius for 10-15 min.
To prepare the filling, mix the indicated ingredients.
Spread 1 tsp of the filling on each cookie and cover with a second cookie.
Decorate Linz cookies as desired.