Making Hostess Sheet Cake is a breeze with these easy steps:

1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
2. Mix Dry Ingredients: In a large bowl, combine the flour, sugar, cocoa powder, baking powder, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together the milk, vegetable oil, eggs, and vanilla extract until well blended.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until smooth.
5. Add Boiling Water: Carefully stir in the boiling water until fully combined. The batter will be thin, which is normal.
6. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
7. Bake: Place in the oven and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and allow the cake to cool in the pan for 15-20 minutes before transferring to a wire rack.
9. Make Frosting: In a medium bowl, beat together the softened butter, cocoa powder, powdered sugar, milk, and vanilla extract until smooth and creamy.
10. Frost the Cake: Once the cake is completely cool, spread the frosting evenly over the top.

By following these steps, you’ll create a delicious Hostess Sheet Cake that’s sure to impress!