Step 1

In a medium mixing bowl, combine the flour, sugar, and salt.

Step 2

In a saucepan, melt the butter and add in the cocoa powder.

Step 3

Stir in the boiling water, allowing mixture to boil for about 30 seconds before removing from heat.

Step 4

Pour over flour mixture and stir lightly.

Step 5

In a small bowl, add the buttermilk, eggs, baking soda, and vanilla.

Step 6

Stir until combined.

Step 7

Pour into chocolate/flour mixture and stir until combined.

Step 8

Pour batter into cookie sheet (use an 18 x 13 to avoid spillage).

Step 9

Bake cake in preheated oven, 350, for about 19-21 minutes.

Step 10

While cake is baking, make frosting by melting butter in a saucepan.

Step 11

Add cocoa powder and stir until combined.

Step 12

Remove from heat and add in the milk, vanilla, and powdered sugar.

Step 13

Add in the pecans.

Step 14

Pour frosting over the warm cake once cake is removed from oven.

Step 15

Allow to sit for about 30 minutes prior to cutting into squares!