Southern Little Layer Cake (10 Layers)

Name: Southern Little Layer Cake (10 Layers)
Prep time: 40 min
Cook time: 20 min
Total time: 1 h
Cuisine: American, Southern
Ingredients: 2 ½ cups granulated sugar; 1 cup butter (2 sticks); 1/2 cup butter-flavored shortening; 6 eggs (room temperature); 2-3 teaspoons vanilla extract; 4 ½ cup all-purpose flour; 1 ½ teaspoon baking powder; 1/4 teaspoon salt; 3 cups whole milk (warmed); 1 cup unsalted butter (2 sticks); 2 cups granulated sugar; 1 cup brown sugar (packed); 3/4 cup unsweetened cocoa powder (sifted); 12 oz evaporated milk; pinch sea salt; 1 tablespoon vanilla extract