Dark Chocolate Olive Oil Cake

Name: Dark Chocolate Olive Oil Cake
Prep time: 10 min
Cook time: 45 min
Total time: 55 min
Cuisine: European, Mediterranean
Ingredients: ¾ cup extra-virgin olive oil ((180ml), more for greasing the pan); ½ cup good-quality unsweetened cocoa powder ((70g)); ½ cup boiling water ((120ml)); 1 tablespoon pure vanilla extract; 1⅓ cups all-purpose flour ((165g)); ½ teaspoon baking soda; 1 teaspoon sea salt; 1 cup super fine sugar ((195g)); 3 large eggs; Cyprus flake salt (or flaky sea salt); ½ cup heavy cream ((120ml), I used whipped coconut cream); ½ teaspoon ground cardamom; 1 teaspoon dried rose petals (optional); ½ cup chopped unsalted pistachios ((65g))