Step 1

Make the crust:

Step 3

Line a 9-inch-by-13-inch baking pan with nonstick foil, leaving a 2-inch overhang on 2 sides.

Step 4

In a food processor, process the graham crackers until you have crumbs. You should have about 2 1/4 cups.

Step 5

Add the butter, sugar and salt and pulse until evenly moistened.

Step 6

Tip the crumbs into the prepared pan and press them down into an even layer on the bottom.

Step 7

Transfer to the freezer while you prepare the filling.

Step 9

Make the filling:

Step 11

Set the chocolate in a medium bowl.

Step 12

In a small saucepan, heat 1 cup cream, espresso powder and salt until hot but not boiling.

Step 13

Pour the hot cream mixture over the chocolate and let it stand for 2 minutes.

Step 14

Add the vanilla and whisk until smooth.

Step 15

Set aside to cool completely.

Step 17

Assemble:

Step 19

In a large bowl or in the bowl of a stand mixer fitted with the whisk attachment, whip the remaining 2 cups heavy cream until you have stiff peaks.

Step 20

Add the chocolate mixture and gently fold to combine.

Step 21

Pour the mixture over the prepared crust, and spread it out into an even layer.

Step 22

Cover with plastic wrap and chill until firm, at least 2 hours.

Step 23

To serve, cut into squares and serve with a dollop of whipped cream and chocolate shavings, if desired.