Pureed raisins maintain the moisture of eggs and work to bind together ingredients when baking a cake or a bread. They also add a tang to whatever you are baking. Dates also work in this recipe.
This recipe is straightforward. You will need:
Let the raisins/dates soak in the boiling water for 5-10 minutes. Use a hand blender to puree them into a smooth paste.
Raisins and dates can double as an egg replacer and a natural sweetener. Also, if you do not use the puree in one recipe it can keep in the fridge in an air tight container for up to 10 days.