Ingredients

For the Chocolate Sponge Cake:

• 2 cups all-purpose flour
• 1 ¾ cups granulated sugar
• ¾ cup unsweetened cocoa powder
• 2 tsp baking powder
• 1 ½ tsp baking soda
• ½ tsp salt
• 3 large eggs
• 1 cup buttermilk
• ½ cup vegetable oil
• 2 tsp vanilla extract
• 1 cup hot water

For the White Cream Filling:

• 2 cups heavy whipping cream
• ¾ cup powdered sugar
• 1 tsp vanilla extract
• 1 ½ cups crushed chocolate sandwich cookies (like Oreos)

For the Cookies and Cream Frosting:

• 1 cup unsalted butter, softened
• 3 cups powdered sugar
• 2 tbsp heavy cream
• 1 tsp vanilla extract
• 1 cup finely crushed chocolate sandwich cookies

For Garnish:

• Whole or halved chocolate sandwich cookies
• White chocolate shavings (optional)