How to Start a Sourdough Starter from Scratch (Even If You've Failed Before)

If you've ever tried to start a sourdough starter and ended up with a sad, flat jar of flour paste that smelled like nail polish remover — friend, you are not alone. I've been there. Most of us have.

Here's what I've learned after years of baking sourdough on our homestead in Americus, Georgia, and teaching hundreds of beginners through our Grit & Grace Bootcamp: starting a sourdough starter is less about perfection and more about patience.

Our starter, Myrtle, is named after my mother-in-law Beth. She's fed every single day with water from our homestead well and organic flour. She's bubbly, active, and full of life — just like the woman she's named after.

What you'll need

• A clean glass jar (wide-mouth mason jar works great)
• Unbleached all-purpose or bread flour (King Arthur is what we use)
• Non-chlorinated water (filtered, well water, or room-temp tap water left out overnight)
• A kitchen scale (grams are your friend)
• A rubber band or piece of tape to mark rise level
• Patience — and grace for yourself

Day 1: The beginning

Mix 50g of flour and 50g of water in your jar. Stir well until no dry flour remains. Cover loosely (not airtight) and leave at room temperature (ideally 70–75°F). Mark the level with your rubber band.

Don't stress the clock — watch the starter, not the schedule.

Days 2–3: The waiting game

Discard all but 50g of your starter. Add 50g fresh flour and 50g water. Stir, cover, and wait. You may see bubbles starting to form. You may also notice a funky smell — that's normal. It means wild yeast is waking up.

Days 4–7: Building strength

Keep feeding daily. By day 4 or 5, most starters start showing more consistent activity — bubbles, a domed top, and a pleasant tangy smell. By day 7, many starters are ready to bake with.

Some starters take 10–14 days, especially in cooler kitchens. That's okay. Keep going.

How to know your starter is ready

The float test: drop a small spoonful of starter into a glass of water. If it floats, it's ready. If it sinks, give it another day or two of feedings.

Common problems (and gentle fixes)

• Liquid on top (hooch): Your starter is hungry. Pour it off or stir it in, then feed.
• No bubbles after 5 days: Try a warmer spot, like on top of your fridge or near your oven.
• Smells like acetone or nail polish: Normal in early days. Keep feeding and it will mellow.
• Pink or orange streaks: Discard and start over — that's contamination.

Want to skip the guesswork?

We sell both live starter (ready to bake with) and dehydrated starter (shelf-stable, ships anywhere) on our Etsy shop. You can also grab our full sourdough guide — Grit & Grace: The Wild Yeast Way — on Amazon or our Stan Store.

FAQ

How long does it take to make a sourdough starter?

Most starters are ready to bake with in 7–14 days. Warmer kitchens tend to move faster.

Can I use whole wheat flour?

Yes! Whole wheat flour has more wild yeast and can actually speed up the process. Many bakers use a 50/50 mix of whole wheat and all-purpose.

Do you sell starter?

Yes — live and dehydrated starter available on our Etsy shop. Ships nationwide.