Preheat the oven to 350f. Line a 9×13 inch pan with parchment. Melt butter and 1 ½ cups of choc chips until smooth. Stir in sugar, vanilla and instant coffee. Whisk eggs in a small bowl for a minute or two. Stir into chocolate mix. Add flour, cocoa and baking powder. Stir until combined. Stir in the rest of the chocolate chips. Spread into prepared pan. Bake for around half an hour or until the brownies are just set. Cool. Slice into bars.

To make icing, add butter, two cups of powdered sugar, cocoa powder, vanilla and a quarter cup of warm milk into a bowl. Beat until smooth, adding more milk gradually. Spread icing thickly over cooled bars. Add festive sprinkles for the holiday.