2/3 cup butter, softened 
1-2/3 cups sugar 
3 large eggs, room temperature 
2 cups all-purpose flour 
2/3 cup baking cocoa 
1-1/4 teaspoons baking soda 
1 teaspoon salt 
1-1/3 cups 2% milk 
Confectioners' sugar or favorite frosting
1. In a bowl, cream butter and sugar until light and fluffy, 5 to 7 minutes. Add eggs, 1 at a time, beating well after each addition. Combine flour, cocoa, baking soda and salt; add to creamed mixture alternately with milk, beating until smooth after each addition. Pour batter into a greased and floured 13x9-in. baking pan. 
2. Bake at 350° until a toothpick inserted in center comes out clean, 35 to 40 minutes. Cool completely on a wire rack. When cake is cool, dust with confectioners' sugar or top with your favorite frosting.
TOTAL TIME: Prep: 15 min. Bake: 35 min. + cooling 
YIELD: 15 servings. 
If you need to learn how to make chocolate cake from scratch, this easy homemade chocolate cake recipe is a perfect place to start. It appeared on a can of Hershey's cocoa way back in 1943. 
Nutrition Facts
1 piece: 257 calories, 10g fat (6g saturated fat), 67mg cholesterol, 368mg sodium, 38g carbohydrate (23g sugars, 1g fiber), 4g protein.