Grease a 9"x5" baking pan, set aside. Preheat your oven to 350 degrees F.
In a large bowl combine the melted butter, sugar and vanilla, whisk to combine. Add in the eggs on at a time.
Sift the flour, cocoa, salt, and baking soda into the wet mix, stir until smooth. Pour batter into the greased baking pan and bake 20-25 minutes or until a toothpick comes out clean.Allow to cool before slicing.
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