Preheat the oven to 325 degrees F. Grease and line two 6 inch cake pans with parchment paper.
Soak cake strips in ice cold water.
In a medium bowl, whisk together the flour, sugar, cocoa powder, expresso powder, baking powder, and salt. Set aside.
In a large bowl, whisk together the chocolate milk, oil, eggs, and vanilla.
Add the dry ingredients to the wet and whisk until just combined.
Lastly, whisk in the hot coffee until fully combined.
Divide the batter between the 2 cake pans.
Wrap the cake strips around the pans and bake for 35-40 minutes or until a toothpick inserted comes out clean.
Allow the cakes to cool for a few minutes before turning out onto a wire rack to cool completely.
Once cool, wrap the cakes tightly in plastic wrap and freeze until ready to decorate. (Frozen cake layers will be much easier to frost!)