Dr Pepper Texas Sheet Cake

Name: Dr Pepper Texas Sheet Cake
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 2 cups granulated sugar; 2 cups all-purpose flour; 1 cup (2 sticks) unsalted butter; 1/2 cup unsweetened cocoa powder; 1 cup Dr Pepper; 2 large eggs, lightly beaten; 1/2 cup buttermilk; 1 teaspoon vanilla extract; 1 teaspoon baking soda; 1 teaspoon ground cinnamon; 1/4 teaspoon Kosher salt; 1/2 cup (1 stick) unsalted butter; 1/4 cup unsweetened cocoa powder; 1/4 cup Dr Pepper; 2 tablespoons whole milk; 4 cups powdered sugar, sifted; 2 teaspoons vanilla extract; 1 1/2 cups chopped pecans