Prepare the Crust: Start by making a chocolate cookie crust using crushed chocolate cookies and melted butter.
Brew the Espresso: Brew a strong espresso or coffee. The rich espresso flavor will infuse into the chocolate filling, creating a deliciously bold taste.
Make the Chocolate Filling: In a mixing bowl, combine melted chocolate, espresso, sugar, eggs, flour, and a pinch of salt. Stir until smooth and well combined.
Pour the Filling Over the Crust: Once the chocolate filling is ready, pour it over the prepared crust in the baking dish. Use a spatula to spread it evenly.
Bake to Perfection: Bake the pie bars in a preheated oven until the filling is set and slightly firm to the touch. The edges should be slightly crispy while the center remains gooey and decadent.
Cool and Slice: Allow the chocolate espresso pie bars to cool completely in the baking dish before slicing them into squares or bars.