In a large bowl add the flour, sugar, and salt, then mix well. Set aside.
Add the water, butter, and cocoa to a large saucepan, and bring to a boil over medium heat, whisking until smooth.
Pour immediately over the flour mixture, and mix well with a wooden spoon.
Add the sour cream, soda, and eggs, and mix well.
In a 350 degree preheated oven, bake for 25-30 minutes or until toothpick comes out clean.
Frost cake while warm. Let cool for about 20 minutes before sprinkling on the peppermint.