Building Your First Sourdough Starter

Days 1-3: The Quiet Beginning

Start with 50g flour and 50g water in a clean jar. Mix thoroughly until there's no dry flour. It'll look like thick paste. Cover loosely with cloth or paper towel — you want air circulation but not dust getting in.

Nothing obvious happens the first couple days. That's normal. The wild microbes are waking up and establishing themselves. You might see a few tiny bubbles by day two, but don't get excited yet. This is just the beginning.

On day two and three, feed it the same way: discard half the mixture (about 50g) and add 50g fresh flour plus 50g water. Stir well. The discard you're throwing away? You can actually use it for crackers or other recipes, so don't waste it.

• Use room temperature water — not cold or hot
• Whole wheat flour speeds up the process if you use some
• Keep the jar somewhere consistent, ideally 65-75°F

Days 4-5: Things Get Interesting

Around day four, you'll notice real activity. Bubbles rise to the surface. You might see a layer of foam. The smell changes too — less flour-like, more fermented and slightly sour. This is the good stuff happening.

Keep feeding twice daily: discard half, add 50g flour and 50g water. The jar's going to feel more alive now. It'll rise between feedings and then collapse a bit. This cycle is exactly what you want to see.

Some people see a layer of brown liquid on top — that's called hooch. It's perfectly fine. You can stir it back in or pour it off, your choice. It won't hurt anything either way.

By day five, you've probably got something that looks and smells like a real starter. Bubbly, active, with that characteristic sour smell. Don't rush though. One more day of feeding builds strength.

Maintenance After Day Seven

Once you're baking, you'll move to once-daily feeding. Many bakers do this in the morning or evening — whatever fits your schedule. Feed it 50g discard out, 50g fresh flour, 50g water.

Store it on the counter if you're baking regularly, or in the fridge if you're baking once or twice a week. Refrigeration slows everything down. A cold starter takes longer to rise but it's much easier to maintain.

You'll develop a rhythm. Most people find a spot for their jar — next to the coffee maker, on a shelf above the stove, wherever. It becomes part of the kitchen routine.

What You Actually Need

The equipment list is refreshingly simple. A clean jar — glass works best because you can see what's happening inside. Any size from 500ml to 1 liter is fine. You don't need special fermentation jars or airlocks or any of that.

You'll need flour (all-purpose works, bread flour is fine, even whole wheat) and water. That's it. A spoon for stirring. Maybe a scale if you're into precision, but honestly a rough 1:1:1 ratio by eye works fine for beginners.

Cover the jar loosely — cloth, paper towel, or even a loose lid. You want air in there. A sealed container won't work because the microbes need oxygen and gas needs to escape.