2In a bowl, mix together 2 cups of all-purpose flour, 1 cup of crushed Oreos, ¾ cup of black cocoa powder, 2 tsp of baking soda, 2 tsp of baking powder, and 1 tsp of salt.
3In a separate bowl, mix together 1 ¾ cups of sugar, 1 tbsp of vanilla extract, 3 eggs, 1 cup of buttermilk, 1 cup of hot water, and ½ cup of vegetable oil.
4Add the wet ingredients to the dry ingredients and mix well.
5Pour the batter into mini cake pans and bake at 350°F for 15 minutes.
6Let the cakes cool completely.
7Combine 1 can of sweetened condensed milk, 1 can of evaporated milk, 2 cups of whole milk, and 2 tsp of vanilla in a bowl.
8Mix together 2 ½ cups of cold heavy cream, ½ cup of powdered sugar, 1 tsp of vanilla, and ½ - ⅔ cup of crushed Oreo crumbs.
9Soak the cooled cakes with the milk mixture.
10Top the cakes with the whipped cream and garnish with Oreo crumbs and a whole Oreo cookie.