Combine the butter, white sugar, brown sugar and tahini paste in a bowl and mix well for a few minutes.
Stir in the egg and egg yolk, as well as vanilla and give it a good mix.
Sift in the flour, baking soda and salt then add the chocolate chips and mix gently with a spatula.
Transfer the dough into a 25x25cm square pan lined with baking paper.
Level the dough and refrigerate for 1 hour.
Bake in the preheated oven at 180°C for 25 minutes.
Allow to cool down in the pan before slicing and serving.
Ustensile si echipamente
Kitchen scale
Mixer
Bowls
Spatulas
25x25cm square baking tray
Baking paper
Baking oven
Fridge
Notes
Use store-bought sesame seed paste or make your own at home by roasting plain sesame seeds until golden brown then, once cooled, processing them in a food processor until a silky paste forms..
Use dark chocolate to balance out the sweetness of the recipe.