In a small bowl, add the milk, eggs, baking soda, and vanilla.
Stir until smooth.
Pour mixture into chocolate/flour mixture and stir until combined.
Pour batter into cookie sheet (use 18 x 13 to avoid spillage).
Bake the cake in a preheated oven, 350, for 19-21 minutes.
While the cake is baking, make the frosting by melting the butter in a saucepan.
Add cocoa powder and stir until homogeneous.
Remove from heat and add milk, vanilla and powdered sugar.
Add in pecans.
Pour the garnish over the warm cake as soon as the cake is removed from the oven.
Let it sit for 30 minutes before slicing it into squares!
Enjoy!
