1.Preheat oven to 350 degrees, spray an 8 X 8 inch square pan and set aside.
2.In a large mixing bowl, combine all dry ingredients with a whisk.
3.In a measuring cup, add all liquid and pour into dry. Start our by mixing with a whisk. Then, use a rubber spatula to scrape sides and dig deep to incorporated all dry into wet until well combined. Let batter sit for just 5 minutes on the counter.
4.Pour into prepared pan. Smooth out with spatula.
5.Bake from 28 to 35 minutes or until cake springs back when lightly touched on top and a toothpick comes out clean or with dry crumbs. Try not to over bake.
6.Let cool completely. In that time make your frosting.
7.In a medium to large mixing bowl, add melted butter, cocoa powder, salt and vanilla. Mix with spatula then switch over to a hand held mixer. Add one tablespoon of milk along with the sugar. Mix on low until all is combined. If needed add more milk. Mix until nice and creamy. Spread on cooled cake. Cut into nice squares and ENJOY!