German Chocolate Cake

Name: German Chocolate Cake
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 2 cups granulated sugar; 1 3/4 cups all-purpose flour; 3/4 cup unsweetened cocoa powder; 1 1/2 teaspoons baking powder; 1 1/2 teaspoons baking soda; 1 teaspoon salt; 2 large eggs; 1 cup buttermilk; 1/2 cup oil ((vegetable or canola oil)); 2 teaspoons vanilla extract; 1 cup boiling water; 1/2 cup light brown sugar; 1/2 cup granulated sugar; 1/2 cup butter; 3 large egg yolks; 3/4 cup evaporated milk; 1 Tablespoon vanilla extract; 1 cup chopped pecans; 1 cup shredded sweetened coconut; 2/3 cup unsweetened cocoa powder; 3 cups powdered sugar; 1/3 cup evaporated milk; 1 teaspoon vanilla extract