01 -
Stir the instant coffee powder into warm water in a small dish. Let it cool down a bit.
02 -
Using a large bowl, mix the softened unsalted butter with powdered sugar until it's fluffy and pale.
03 -
Pour in the whisked egg and cooled coffee solution to your butter mixture. Stir until everything's well combined.
04 -
In another bowl, combine plain flour, cornstarch, and cinnamon powder.
05 -
Slowly add your dry ingredients into the wet mixture, stirring until you've got a nice soft dough.
06 -
Take tablespoon amounts of dough and roll them into small balls. Place them on a parchment-lined baking sheet with room between each one.
07 -
Pop them in a 350°F (175°C) preheated oven for 20-25 minutes until they're slightly golden around the edges. Let them cool completely on a wire rack.
08 -
Once cooled, dunk half of each cookie into melted dark chocolate, then quickly sprinkle with crushed pistachios. Put them on parchment paper until the chocolate hardens.