Chocolate Sandwich Cookie Cake

Adjust the oven rack to the center of the oven and preheat the oven to 350 degrees F.

Butter two 9 inch tart pans or two 9 x 2 inch cake pans and line the bottoms with circles of parchment paper.

To make the cake layers, sift together the cocoa powder, cake flour, salt, baking soda, and baking powder in a bowl.

In the bowl of a standing electric mixer, or by hand, beat together the butter and sugar about 5 minutes until smooth and creamy. Add the eggs one at a time until fully incorporated. (If using a standing electric mixer, stop the mixer as necessary to scrape down the sides)

Mix together the coffee and milk. Stir half of the dry ingredients into the butter mixture, the add the coffee and milk. Finally stir in the other half of the dry ingredients.

Divide the batter into the two prepared cake pans and bake for 25 minutes, or until a toothpick inserted into the center comes out clean. Cool completely before assembling.

To make the filling, in a standing mixer fitted with a whisk, mix together sugar and butter. Mix on low speed until well blended and then increase speed to medium and beat for another 3 minutes.

Add vanilla and cream and continue to beat on medium speed for 1 minute more, adding more cream if needed for spreading consistency.

Run a knife around the inside of each of the cakes which will help release them from the pans. Tilt one cake out of the pan, remove the parchment paper from the bottom and invert it back onto a cake plate. Spread a good-sized layer of icing over the top. Top with the second cake layer and decorate the sides, if you wish, with crushed peppermint. Sprinkle powdered sugar over the top of the cake just before serving.