Grease the cone molds with oil. Roll out the puff pastry dough and cut it into thin strips. Wrap the strips around the molds to form cones.

Bake for 20 minutes, then broil for a few minutes until golden brown. Let them cool slightly.

Carefully remove the pastry from the molds. Fill the cones with cream, and drizzle with simple syrup before serving. Garnish with chopped pistachios.