For the Cake:
Combine the cake mix, eggs, butter, milk, and flavoring in your mixing bowl.
Mix until well combined.
Pour into 2 prepared 9 inch cake pans.
Bake on 325 degrees for 25 minutes, or until toothpick tests clean.
Cool on wire rack for 10 minutes and then turn out to cool completely.
Making the icing:
In your mixing bowl combine the sticks of butter, cocoa, confectioner’s sugar and vanilla.
Begin mixing slowly and adding the heavy cream a little at a time until the icing is spreading consistency. Mix on high for a couple of minutes after scraping down the sides.
Frost the bottom layer and add a circular layer of pecan halves. Place the next layer on and repeat.