You can also sprinkle coarse powder on cream or panna cotta, for example.
Remarks
If you don't have time to leave the butter at room temperature to soften, put it in the microwave for periods (2 or 3) of 10 seconds maximum, checking its texture each time by pressing on it a little. It should be soft.
You can replace some or all of the hazelnuts with almonds.
The name sbrisolona is derived from "sbrisa", meaning crumb in the Mantuan dialect.