Preheat the oven to 350F.
Transfer the yogurt in a bowl.
Sieve both flours, baking powder and keep aside..
Add the eggs, black sugar,treacle syrup and beat until they turns soft, now add the oil and yogurt to the sugar-egg mixture,vanilla extract and beat again everything for a while.
Add the flours and stir well until everything get well mixed.
Grease a bundt pan, sprinkle the chocolate chips and chopped walnuts.
Pour the cake batter into the pan and bake for 35-40minutes or a skewer inserted comes out clean.
Cool completely in a wire rack.
Slice and enjoy..