Step 1

Preheat the oven to 350 degrees Fahrenheit and grease a 9x13-inch cake pan with oil or butter.

Step 2

In a large mixing bowl, sift the flour, sugar, salt, baking soda, and cocoa powder.

Step 3

In a separate bowl or measuring jug, measure the oil, vinegar, vanilla, and cold water. Mix well.

Step 4

Pour the wet ingredients over the dry and stir until smooth.

Step 5

Bake for 30 to 40 minutes or until a toothpick inserted into the center comes out clean or with a few dry crumbs. Let the cake cool completely.

Step 6

While the cake cools, make the frosting.

Step 7

In a medium bowl, blend the cocoa powder and softened butter until smooth.

Step 8

Gradually add the powdered sugar and milk, beating to spreading consistency. Add small amounts of extra milk if needed to thin the frosting.

Step 9

Stir in the vanilla extract.

Step 10

Once the cake is completely cooled, spread the frosting evenly over it.

Step 11

Serve and enjoy!