Profile PhotoMark Floerke
Keymaster
@independant-consultant
Post count: 223

Hello @luisgutierrez,

Not sure what kind of quantities you need.  Sunmaid Raisins in California do sell raisin juice concentrate.
To make small quantities for testing and use in whole grain and multigrain breads, see this link:  https://www.food.com/recipe/raisin-juice-for-baking-whole-grain-whole-wheat-or-dark-breads-311410

How much depends on how much colour and activity you would like.  I would start at 4% of the flour weight and adjust from there.