How to make chocolate icing to top a parfait

I want to make a parfait with jello on the bottom, yogurt in the middle and then a layer of chocolate pudding on the top. I would really like to be able to put a hard chocolate crust on top of it, then a dab of whipped cream w/ strawberries and blueberries on top…and maybe a chocolate kiss in the middle. Any thoughts on how to make the chocolate “crust”? I tried googling on icing but all I found were frosting recipes - the soft kind.

Hard Chocolate Glaze

“A chocolate glaze that sets up hard. Use it on cakes or brownies.”

1/2 cup unsalted butter
10 (1 ounce) squares semisweet chocolate

Chop the chocolate into small pieces. Combine chocolate with butter in the top of a double boiler, over simmering water. Stir frequently until melted and smooth. Remove from heat.