Walnut and Raisin Levain

Levain
237g/ 95% White Bread Flour, unbleached
13g/ 05% Whole Wheat Flour
250g/ 100% Water (12C)
100g/ 20% Mother
- Dissolve 100g of Mother in 250g water at 12 degrees celcius.
- Add liquid to flour and mix until a slack mass forms
- Refrigerate dough for 6 hours
- Remove Levain from fridge and let rise at room temperature (18C ideally) for a further 18 hours
- Allow 24 hours of maturation before using