Step 1

In a large bowl, beat the heavy cream with a hand mixer on medium speed.

Step 2

Once the cream begins to thicken, add the powdered sugar and the vanilla.

Step 3

Continue to beat until the whipped cream thickens and stiff peaks form.

Step 4

Spread a 1/2-inch layer of the whipped cream on each of the chocolate wafer cookies.

Step 5

Spread a layer of the whipped cream on a serving plate.

Step 6

Stack the cookies upright on the whipped cream layer to form a line.

Step 7

Once all the cookies are in a line, spread the remaining whipped cream over the cookies to form a log-shaped cake.

Step 8

Cover and refrigerate the cake until the moisture of the whipped cream softens the wafer cookies, at least 12 hours and up to overnight.

Step 9

Decorate the top of the cake with the chocolate curls.

Step 10

Slice the cake on a diagonal for a striped effect.

Step 11

Serve.