Pour boiling water into the blender and pour in jelly powder.
Cover and blend on high speed for 3 or 4 seconds.
Add lemon juice and raspberries and blend until crushed.
Chill until mixture mounds with a spoon.
Fold into dessert-topping mix prepared according to package directions.
Spoon into glass compote or into paper souffle cups lined with lady fingers sprinkled with orange liqueur.