Butterscotch Cake with Salted Caramel Frosting

This cake was a big hit.   Easy to make and the flavors go so well together.

BUTTERSCOTCH CAKE WITH SALTED CARAMEL FROSTING
(serves 12)

Cake Ingredients: 
*2 cups light brown sugar
*1/2 cup butter, softened
*1 1/2 teaspoon pure vanilla extract
*2 eggs
*2 cups flour
*1 teaspoon baking soda
*1 teaspoon baking powder
*1/2 teaspoon salt
*1/4 teaspoon ground cinnamon
*1 cup buttermilk
Frosting Ingredients:
*1 1/2 light brown sugar
*1 tablespoon + 1 teaspoon flour
*1/4 cup butter
*1/4 cup heavy cream
*1 teaspoon pure vanilla extract
*2 tablespoons butter
*1 teaspoon coarse sea salt

Cake Directions:
~Preheat oven to 350 degrees.
~Grease and flour a 9x13 inch baking pan.
~In a large mixing bowl, cream butter and brown sugar together until smooth and fluffy.
~Add vanilla and mix.
~Mix in eggs once at a time, beating on low until they are just mixed in.
~In a separate bowl, sift together the flour, baking soda, baking powder, salt and cinnamon.
~Alternate mixing in  the flour and buttermilk into the sugar mixture starting with the flour.
~Mix until smooth, scraping down sides of the bowl when needed.
~Pour batter into prepared pan.
~Bake for 35-40 minutes, or until a tooth pick inserted in the middle of the cake comes clean.
~Remove from oven and cool completely before frosting.

Frosting Directions:
~In a small saucepan, mix together all the ingredients except the vanilla, 2 tablespoons of butter and sea salt.
~Heat over medium heat to bring mixture to a boil, stirring often.
~Once mixture comes to a full boil, allow to boil for 1 minutes, stirring continuously.
~Remove from heat and stir in vanilla extract and remaining butter.
~Allow the mixture to cool from hot to warm.
~Stir vigorously every 3-5 minutes, until it becomes warm (do not allow to cool to much or it will set before spreading it).
~Spread evenly over cake.
~Sprinkle sea salt evenly over frosting.
~Allow frosting to set completely before cutting into cake.