The oven stays off for this one, which is most of the reason it lives in my rotation. Nine hours sounds like a commitment until you look at where those hours actually go. Twenty minutes of real work, and the rest is the freezer and the fridge doing their job while you sleep. I make these the night before anything I care about. A dessert that asks nothing of you on the day itself is worth more than one that tastes slightly better and eats your whole afternoon.

Most no-bake cheesecake recipes hand you one bowl of filling and call it finished. This one divides it. Three quarters of a cup goes down plain over the crust, and everything left gets melted chocolate folded through it. You end up with a pale stripe sitting under a dark one, which looks like you did something difficult.
The looks are secondary. What you get is two textures. The plain layer stays firm and slightly tangy because it is only cream cheese and sugar. The chocolate layer is looser, softer, because whipped cream goes into that half. Eating through both in one bite is a different thing than eating through one thick layer twice. It costs you ninety seconds and one extra bowl.
A quarter teaspoon goes into the melted chocolate. You will not taste coffee. What it does is push the chocolate darker and rounder, the way a pinch of salt does in caramel. Leave it out and the filling tastes fine but flat. It is the cheapest upgrade in the recipe.
One thing to watch. Use finely ground espresso powder from a fresh jar. Instant espresso granules do not dissolve properly in melted chocolate, and you will get gritty specks running through an otherwise smooth filling. I learned that the annoying way.
For the cream cheese, full fat and genuinely softened. Cold cream cheese never fully smooths out, and once lumps are in the filling there is no fixing them. I set mine on the counter an hour ahead and cut it into cubes to speed it along.
Pulse the chocolate sandwich cookies with a pinch of salt until you have fine crumbs, then stream in the melted butter with the processor running. You want the mixture damp enough to hold together when you squeeze a handful. If it falls apart, give it a few more seconds.
Line the pan with a parchment sling before you press anything into it. This matters more than it sounds like it should, because there is no clean way to get these bars out otherwise. Press the crumbs flat with the bottom of a measuring cup, then freeze for at least an hour.
Beat the cream cheese, confectioners sugar, vanilla, and salt on low to medium for a full three to five minutes. Scrape the bowl down twice. Rushing this step is the most common route to a grainy filling.
Melt the chocolate and espresso powder together in fifteen second bursts at fifty percent power, stirring after each one. Fold it into the filling left in the large bowl. Whip the cream to medium peaks, then fold that in until no pale streaks remain. Spread it over the plain layer, cover, and refrigerate at least eight hours.

Soak a chef knife in hot water, dry it completely, then cut. Repeat between every single slice. It is tedious and it is the whole difference between clean edges and smeared ones. Covered in the fridge they keep three days, and they freeze well past that.
An eight inch pan gives you taller, thicker bars. A nine inch pan gives you shorter ones and slightly more of them. Both work. I use the eight inch when the bars are the main event and the nine inch when they are sitting next to other things on a table.
The crust can sit in the freezer for up to three days before you build on it. Cover it with foil or plastic if it is going longer than an hour. That splits the recipe into two short sessions instead of one, which is useful when the week is tight.
No-bake chocolate cheesecake bars with a cookie crumb crust, a plain cheesecake layer, and a whipped chocolate layer on top.
The espresso powder deepens the chocolate without adding coffee flavor. Use finely ground powder from a fresh jar so it dissolves completely. Store covered in the refrigerator up to 3 days, or freeze for longer.