Marble Loaf Cake

Bahan-bahan (8 porsi)

• 2 cups (250g) all-purpose flour (spooned & leveled)
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 1 and 1/4 cups (250g) granulated sugar
• 3 large eggs, at room temperature
• 1 Tablespoon pure vanilla extract (yes, 1 Tbsp!)
• 1 cup (240g/ml) buttermilk, at room temperature and divided
• 1/2 teaspoon espresso powder
• 1/4 cup (21g) Dutch-process cocoa powder
• 4 -ounce (113g) quality semi-sweet chocolate bar, finely chopped*
• 6 Tablespoons (90g/ml) heavy cream or heavy whipping cream
• optional: fresh raspberries and mint sprigs, for garnish