tep 1: Prepare the Whipped Cream

For the best results, chill your large mixing bowl and the beaters from your hand mixer (or the whisk attachment of your stand mixer) in the freezer for 15-20 minutes before you begin. A cold environment helps the cream whip up faster and lighter.

Pour the 3 cups of very cold heavy whipping cream into the chilled bowl. Using the mixer on medium-high speed, beat the cream until it begins to thicken and soft peaks form (when you lift the beaters, a peak forms but its tip flops over).

Add the sifted powdered sugar, vanilla extract, and 2 tablespoons of cocoa powder. Continue to beat on medium-high speed until stiff peaks form. Stiff peaks mean that when you lift the beaters, the peaks hold their shape and stand straight up. Be careful not to over-beat, or the cream will start to look grainy and turn into butter.

Step 2: Assemble the Layers

Line a 9×5 inch loaf pan with plastic wrap, leaving plenty of overhang on all sides. This will make it easy to remove the cake later.

Spread a thin layer of the chocolate whipped cream on the bottom of the prepared pan. This will give the first layer of cookies something to stick to.

Arrange a single layer of chocolate wafers on top of the cream, breaking some cookies as needed to fill in any gaps and cover the surface as completely as possible.

Spread about one-quarter of the remaining whipped cream evenly over the layer of cookies.

Repeat the process—a layer of cookies followed by a layer of cream—three more times, ending with a final layer of cream on top. You should have a total of 4 layers of cookies and 5 layers of cream (including the bottom and top layers).

Step 3: The Magic Chilling Period

Cover the loaf pan with the overhanging plastic wrap, tucking it in snugly against the top layer of cream.

Place the cake in the refrigerator and chill for at least 8 hours, but preferably for 24 hours. This time is not optional; it is essential for the transformation to occur. The longer it chills, the more cake-like and flavorful it will become.

Step 4: Unmold and Garnish

When you are ready to serve, unwrap the top of the cake. Use the overhanging plastic wrap as handles to lift the cake out of the loaf pan and onto a serving platter. Carefully peel away the plastic wrap.

You can serve it as is, or you can decorate it. Dust the top generously with unsweetened cocoa powder or top with beautiful chocolate shavings or curls for a more elegant presentation.

Step 5: Slice and Serve

For the iconic striped look, use a sharp knife to cut the cake on a 45-degree diagonal. Serve immediately and watch your guests marvel at your “baking” skills.