Rinse the oranges with thick salt, then soak them in light salt water for about an hour.
Then, wipe off the water and cut it to a thickness of 5 to 6 mm.

Boil sugar and water in a pot to make syrup.
Add the oranges and continue to boil over medium heat, then remove from the heat when the water is almost gone, remove the oranges and place one at a time on a paper foil.

Mix melted butter and chocolate with sugar and salt in a whisk.
Mix well until the sugar is dissolved to a certain extent, and whisk to mix evenly, adding eggs one at a time.
Add the orange extract and mix lightly. (If you don't have it, add the vanilla extract.)

Put the flours into a sieve and mix them with a rubber spatula. Finally, add walnuts and mix lightly to complete the dough.

Put 70% of the dough into a mold, trim the top side, and then,

Put the boiled orange on top, put it in a preheated oven at 180 and bake it for 20 to 23 minutes.
The dough in a mold smaller than a mini pound was baked in less time.

Boiled oranges become more sticky and sticky as they are baked.
It is an orange brownie that has a good flavor because the smell and taste of oranges permeate the dough.