Chocolate Wafers: In a bowl, sift or whisk together, the flour, cocoa powder, baking soda, and salt.

In the bowl of your electric stand mixer, fitted with the paddle attachment (or with a hand mixer), beat the butter until smooth. Add the sugars and vanilla extract and beat on medium high speed until light and fluffy. Scrape down the sides and bottom of the bowl as needed. Add the flour mixture and beat just until incorporated. Then beat in the milk.

Place the batter on your counter and, using your hands, evenly form the batter into a 10 inch (25 cm) long round log. Carefully wrap the log in plastic wrap. Try not to flatten the log. Refrigerate until firm. This will take several hours or even overnight.

Preheat your oven to 350 degrees F (180 degrees C) and place the oven rack in the center of the oven. Line two baking sheets with parchment paper.

Using a sharp knife, slice the log into 1/4 inch (6 mm) thick wafers. Place the wafers on the baking sheet spacing about 2 inches (5 cm) apart. Bake for approximately 12 to 14 minutes or until the the cookies are firm and the tops of the cookies have cracks (ripples). Remove from oven and let the cookies cool on the baking sheet for about 5 minutes before removing to a wire rack to cool completely. Can be stored in an airtight container, at room temperature, for about 10 days. They can also be frozen.

Icebox Cake: In the bowl of your electric stand mixer, fitted with the whisk attachment, (or with a hand mixer) beat the cream, mascarpone cheese, sugar and vanilla until stiff peaks form.

Next, you will need an 8 inch (20 cm) cake or springform pan with 3 inch (7.5 cm) sides. Line the bottom and sides of the pan with plastic wrap. Cover the bottom of the pan with a layer of chocolate wafers (about 6-7 cookies), tops of the cookies facing down. (See video for demonstration.) Next, cover the chocolate wafers with an even layer of whipped cream (about 3/4  - 1 cup (180 - 240 ml)). Repeat the layers 4 more times so you will end up with 5 layers of chocolate wafers and 5 layers of whipped cream. Cover the top of the pan with plastic wrap and place in the refrigerator overnight (about 24 hours). (This is so the cream has time to be absorbed into the chocolate wafers, giving them a dense, almost cake-like texture.)

When ready to serve, invert the pan onto your serving plate, so the bottom of the cake is now the top. Remove the plastic wrap. If desired, take the remaining chocolate wafers and place them in your food processor and process until finely ground. Gently press the cookie crumbs onto the sides of the cake. This cake can be stored in the refrigerator for about 4 to 5 days.

Makes one 8 inch (20 cm) cake.