01 -
Preheat oven to 175°C. Grease and line two 20 cm round cake pans. In a bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt. In a separate bowl, combine eggs, granulated sugar, brown sugar, vanilla extract, and oil, mixing until smooth. Alternate adding the dry ingredients with the buttermilk, mixing just to combine. Stir in hot water until the batter is smooth. Divide batter evenly between prepared pans and bake for 25 to 30 minutes, or until a toothpick inserted in the center emerges clean. Cool cakes completely before proceeding.
02 -
Whip cold heavy cream with powdered sugar and vanilla extract until stiff peaks form. Gently fold in the crushed Oreo cookies until evenly distributed.
03 -
Heat heavy cream in a small saucepan until just steaming but not boiling. Pour over dark chocolate chips in a heatproof bowl, let stand one minute, then stir until a glossy ganache forms.
04 -
Slice each cake into two even layers, creating four layers in total. Spread cookies & cream filling generously between each layer. Pour ganache over the top, allowing it to gently drip down the sides. Decorate with whipped cream swirls, additional crushed Oreos, mini Oreo cookies, and fresh mint leaves as desired.