Making the Cake

• Preheat the oven to 350°F (175°C) and line an 8×4 loaf pan with parchment paper.
• In a bowl, combine granulated sugar and orange zest. Stir in orange juice, olive oil, and milk until smooth.
• In another bowl, whisk together milk, olive oil, and sugar. Gradually add cocoa powder, flour, baking powder, and salt, mixing until smooth.
• Alternately add scoops of the orange and chocolate batters into the prepared loaf pan, using a spatula.
• Gently swirl the batters together to create marbled patterns.
• Bake for 40-45 minutes, checking for doneness with a toothpick.
• Let the loaf cool in the pan for about 10 minutes before transferring it to a wire rack.
• For the ganache, heat milk and chopped chocolate in a bowl until warm, then stir until smooth.
• Drizzle ganache over the cooled cake, slice, and serve.