So here ya go.....
Cupcake
1 cup all-purpose flour ( I used whole wheat) 
1 cup sugar 
1/3 cup dark chocolate Cocoa powder 
1 teaspoon baking soda 
½ teaspoon baking powder 
½ teaspoon salt 
1 egg, at room temperature 
1/2 cup buttermilk, at room temperature 
½ cups strong black coffee, hot (I used plain water and it worked fine) 
1/4 cup vegetable oil 
1½ teaspoons vanilla extract 
Bake at 350 degrees for 12-15 minutes - it took every bit of 15 minutes
Ok, here comes the good part!!!  let's take a moment of silence for salted caramel sauce!  ......
Ok, enough.  I have never made caramel sauce and had a horror song in my head that it was going to burn but it was pretty easy.  
- ¾ cup buttermilk
 - 1 cup sugar
 - ½ cup brown sugar
 - ½ cup butter, cubed
 - 2 Tbsp Corn syrup
 - 1 tsp seasalt
 - 1 tsp vanilla
 
Directions
- In a large pot (make sure it is large as while this cooks it bubbles), combine buttermilk, sugar, brown sugar, butter, corn syrup and salt.
 - Bring to a boil and reduce heat to low.
 - Cook until nice a caramel-ly rich brown. About 10 min. Stir frequently with a wooden spoon.
 - Remove from heat and stir in vanilla. Continue to stir to cool.
 - Enjoy. (Store in fridge)
 
Almost there - now for the caramel frosting. I kind-of made this up because I had leftover buttermilk in my fridge from earlier this week.
1/2 cup butter - softened
3-5 tablespoons of buttermilk
1 teaspoon vanilla
16 oz of powdered sugar.
Keep alternating with half buttermilk and half powdered sugar. Then just dump some caramel sauce in the frosting. I probably added 8 tablespoons or so. YUMMY