Bon Bon Cake Recipe

Ingredients

• 1 ¾ cups (220g) all-purpose flour, sifted
• 2 cups (400g) granulated sugar
• ¾ cup (75g) unsweetened cocoa powder, preferably Dutch-processed
• 1 ½ teaspoons baking powder
• 1 ½ teaspoons baking soda
• 1 teaspoon salt
• 2 large eggs, at room temperature
• 1 cup (240ml) whole milk, warmed
• ½ cup (120ml) vegetable oil
• 2 teaspoons pure vanilla extract
• 1 cup (240ml) boiling water
• 1 cup (225g) unsalted butter, softened
• 4 cups (480g) powdered sugar, sifted
• ½ cup (50g) cocoa powder, sifted
• ½ cup (120ml) heavy cream
• 1 teaspoon pure vanilla extract
• ½ cup finely ground toasted hazelnuts (or walnuts for variation)
• Pinch of salt