Make the Chocolate Bars

1. Preheat the oven to 320°F (160°C).
2. Melt the chocolate over a double boiler. Gradually add the butter, stirring until smooth.
3. In a large mixing bowl, combine the flour and sugar.
4. Add the eggs to the flour mixture and stir until fully incorporated.
5. Pour the melted chocolate-butter mixture into the bowl and mix until smooth.
6. Place the Silpat® Striped Bar Mold on a perforated baking tray.
7. Fill each cavity ¾ full with the chocolate mixture.
8. Bake for 18 minutes, then let the bars cool before removing them from the mold.

Make the Cookie Base

1. In a stand mixer, beat the softened butter with brown sugar and a pinch of fleur de sel until creamy.
2. Add the egg and mix well.
3. Sift the flour and baking powder, then slowly add it to the butter mixture.
4. Fold in the chocolate chips.
5. Preheat the oven to 320°F (160°C).
6. Roll out the dough to a thickness of ⅛ inch (3mm) on a Silpat® baking mat.
7. Bake the cookie dough for 15 minutes, then let it cool completely.
8. Once cooled, cut the cookie sheet into rectangles that match the size of the bar mold cavities.

Assemble the Bars

1. Carefully place each cooled chocolate bar onto a cookie rectangle to create the perfect layered treat.
2. Serve and enjoy!