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 ((400 g)); 1 3/4 cups all-purpose flour ((210 g)); 3/4 cup unsweetened cocoa powder ((75 g)); 1 1/2 teaspoons baking powder ((6 g)); 1 1/2 teaspoons baking soda ((7.5 g)); 1 teaspoon salt ((5 g)); 2 large eggs; 1 cup buttermilk ((240 ml)); 1/2 cup oil ((vegetable or canola oil) (120 ml)); 2 teaspoons vanilla extract ((10 ml)); 1 cup boiling water ((240 ml)); 1/2 cup light brown sugar ((100 g)); 1/2 cup granulated sugar ((100 g)); 1/2 cup butter ((115 g)); 3 large egg yolks; 3/4 cup evaporated milk ((180 ml)); 1 Tablespoon vanilla extract ((15 ml)); 1 cup chopped pecans ((120 g)); 1 cup shredded sweetened coconut ((80 g)); 2/3 cup unsweetened cocoa powder ((65 g)); 3 cups powdered sugar ((360 g)); 1/3 cup evaporated milk ((80 ml)); 1 teaspoon vanilla extract ((5 ml))