Chocolate Zucchini Cake

Name: Chocolate Zucchini Cake
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 2 cups all-purpose flour; 1 cup unsweetened cocoa powder, (sifted); 2 teaspoons baking soda; 1/2 teaspoon salt; 1 1/2 cups brown sugar; 3/4 cup vegetable oil, canola oil, or avocado oil; 1/4 cup melted butter, (cooled to room temperature); 1/4 cup buttermilk, (at room temperature); 3 large eggs, (at room temperature); 1 1/2 teaspoons vanilla extract; 2 cups shredded zucchini; 1 cup chocolate chips; 1/2 cup unsalted butter, (at room temperature); 3 cups confectioner's sugar; 2/3 cup unsweetened cocoa powder; 1/3 cup milk; 1 teaspoon vanilla extract; Pinch of salt