Popsugar Living Baking Tips Sourdough Starter Day by Day Photos If You're Making a Sourdough Starter For the First Time, Here's a Daily Guide in Pictures 14 May 2020 by Tara Block View On One Page Photo 18 of 27 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 18 Sourdough Starter Day 12 On day 12, I stirred the starter, discarded half (around 4 ounces), and fed it 1/2 cup white-wheat flour and 1/4 cup filtered water, mixing it up so there was no dry flour left. Previous Next Start Slideshow Baking TipsBreadRecipesBakingPersonal EssayDIY