In a mixer, cream together butter and sugar
Small bowl, combine eggs, vanilla, and coffee mix fully
In another bowl add all dry items together flour, baking powder, cinnamon, and salt
Mix well Slowly add flour mixture until fully combined, do not over mix.
Place the dough in your refrigerator for at least one-two hours.
Preheat oven to 350 degrees
Roll out dough on floured solid surface to about 1/2 inch thick. Using a circle cookie cutter, punch out circles and place on a parchment lined baking sheet.
Bake for 8-10 minutes, or until edges are slightly golden
Allow cookies to cool completely before filling with the icing between 2 cookies
Melt the butter in a small saucepan on low heat.
Once the butter is melted, add brown sugar and heavy cream.
Stir the mix constantly over medium heat until sugar is dissolved.
Now add the salt.
Make sure to allow it to bubble for 2 minutes.
Remove from heat and allow to cool (1 hour minimum).
Beat in powdered sugar 1 cup at a time, until you reach desired consistency.