Iraqi Date and Walnuts Cake

Name: Iraqi Date and Walnuts Cake
Prep time: 5 min
Cook time: 1 h 10 min
Total time: 1 h 10 min
Yield: 12 slice
Ingredients: unsalted butter; all purpose white flour; 100 g walnut halves, shelled; 190 g date, pitted; 190 g water; 220 g all purpose white flour; 160 g sugar; 1 tsp baking powder; 1 tsp baking soda; 1 tsp cinnamon, ground; 1 tsp salt; 220 g unsalted butter; 1 egg; 1 tsp vanilla extract, natural; 140 g date syrup