OreO cake - Sugar Booger Sweets

Ingredients

• 2 oz bittersweet chocolate, chopped
• ¾ cup canola oil
• 1 cup sugar
• 1 large egg, room temperature
• 2 cups all-purpose flour
• ½ cup cocoa powder
• 1 tbsp baking soda
• ¾ tsp salt
• 1 cup strong brewed coffee, room temperature
• 1 cup buttermilk, room temperature
• cooking spray
• 6 large egg whites, room temperature
• 4 sticks unsalted butter, softened but still cool, cut into 1/2 inch pieces
• 2 oz white chocolate, melted and cooled to room temperature
• ¾ cup Oreo cookies, crumbled (about 10 cookies)