Preheat oven to 350 degrees. Line 8″ baking pan with parchment paper.
Cream butter and sugar using stand or handheld mixer until light and fluffy. About 5 minutes
Add eggs and continue mixing on medium for another 2 minutes.
Swift together flour, cocoa and salt and whisk well to combine.
Add dry ingredients to butter mixture and mix on low just until combined. Fold in chocolate chips.
Spread mixture into prepared pan
Bake for 20 to 30 minutes (until toothpick inserted comes out with just a few crumbs). Allow to cool on wire rack.
Frosting
Prepare frosting by combining butter, 2 cups confectioners sugar and 1/2 cup milk and beat on high for 2 minutes. Add 1 teaspoon coffee extract and 2 additional cups confectioners sugar and continue beating until light and fluffy and a spreadable consistency. Add additional one cup of confectioners sugar if necessary. For stronger coffee flavor add additional 1 teaspoon of coffee extract.
Add frosting to a piping bag. Cut brownies into squares and pipe frosting on each square.
Notes
These can be cut into 20 bite sized brownies, or 12 large brownies for a dessert serving.Store in an airtight container for up to 3 days.