2. Mix up the starter
Next, you’ll want to mix up your starter. This first mix is important, and an error here could lead to a failure later in the process. Grab some whole grain flour and pour half a cup of it. Mix in a quarter cup of water with the flour.
If you’re having trouble memorizing the proportions, you can keep this tab open while you prepare the starters or use a weighing scale. You should be putting in 50 grams of water and 50 grams of flour. Mix the flour and water until they blend together and then cover them with either plastic wrap or a clean cloth.
After stirring the starter, be sure to clean the sides of your container and remove any overflow as it may lead to the growth of molds as time goes on. You can rinse the sides with water, scrape the overflow off with a kitchen utensil, or even use the abrasive side of your sponge.