Step 1

Add a clean jar to a kitchen scale. Zero (or tare) it so it goes to 0.

Step 2

Add in 25 grams of sourdough starter from the refrigerator.

Step 3

Next, add 25 grams of filtered water.

Step 4

Then, add in 25 grams of flour.

Step 5

Stir well. Loosely cover the jar and place in a warmer location (70-80 degrees).

Step 6

If the starter does not double within 24 hours, get a new jar and use 25 grams of the sourdough starter, 25 more grams of filtered water and 25 grams of flour. Repeat as many times as necessary until it doubles more regularly.

Step 7

Once it is regularly doubling, feed it for 2-3 more days before baking with.