Get supplies and ingredients and wash hands. Preheat oven to 350 degrees and either spray or grease the 10 X 13 pan.

Mix wet ingredients (cocoa,butter,and water).

Mix wet and dry ingredients for 2 minutes.

Mix until you get a batter consistency.

Break eggs into another bowl and beat eggs. Add beaten eggs to batter.

Add buttermilk, baking soda, and vanilla extract to batter mixture.

Mix for 2 minutes.

Pour batter into a pan.

Spread out evenly.

Put batter in the oven.

Set timer for 20 minutes.

When toothpick comes out clean there done. While cooling make frosting.

Mix butter,milk,sugar and boil for 2 minutes.

Beat until frosting consistency.

Spread frosting out on brownies.

Let frosting set and cut.