Method
1. Pre-heat oven - 175°C
2. Grease a clean square pan with cooking spray or butter
3. Add water to a clean saucepan
4. Heat until boiling
5. Add dates to the saucepan
6. Cook - 5 min, medium heat
7. Add baking soda to the saucepan and continue mixing
8. Switch off the heat
9. Set aside - 15 min
10. Grind into a fine paste then set aside
11. Add unsalted butter and granulated sugar to a clean stand mixer bowl
12. Cream until light and fluffy - medium speed
13. Add egg and vanilla extract to the stand mixer bowl
14. Beat until combined
15. Add all purpose flour, whole wheat flour, salt and baking powder
16. Transfer the pureed date mixture to the stand mixer bowl
17. Mix until combined
18. Pour the batter into the greased pan
19. Bake until skewer tests clean - 35 min, 175°C
20. Remove from the oven
21. Let cool completely in the pan
22. Dust with powdered sugar
23. Serve