Chocolate Zucchini Cake - Lidia

Ingredients

• 1 stick unsalted butter, softened, plus more for the baking pan
• 2 cups all-purpose flour, plus more for the baking pan
• 2 medium zucchini
• 3/4 cup unsweetened natural cocoa powder
• 1 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 1 1/2 cups sugar
• 1/2 cup vegetable oil
• 2 large eggs
• 1 teaspoon pure vanilla extract
• 1/2 cup buttermilk
• 1 cup coarsely chopped walnuts, toasted