Place the raisins in a bowl and pour enough boiling water over the raisins to cover them by 2 inches. Let them sit in the hot water for 10 minutes. Reserve ¼ of the raisin water and drain the rest of the water out.
Make the paste:
Place the plump raisins inside a food processor and process them until it turns into a thick paste. Add 1 tablespoon of the reserved water at a time, until the raisin paste has the texture you want. Standard consistency is similar to thick creamy peanut butter.
Store:
Transfer the raisin paste into a lidded container or jar and keep in the refrigerator for up to 3 weeks. It can also be frozen in an ice cube tray and transferred inside a zip bag for up to 6 months.
Use:
Measure 2 teaspoons or raisin paste for every 1 date in your favorite recipes and smoothies.