Recipe

Sourdough Starter

A low-drama, flour-and-water starter you can bake with, keep alive, and actually enjoy maintaining.

By Matt Campbell

•

4.8

A glass jar of bubbly sourdough starter on a bright kitchen counter with a loose lid and a rubber band marking the rise line

Sourdough starter is basically the world’s most useful kitchen pet. You feed it flour and water, it gets bubbly and a little feral, and then it helps you bake bread with flavor that tastes like you tried harder than you did.

This recipe is the starter I recommend when you want simple ingredients, clear steps, and no weird rules. You do not need grapes, pineapple juice, or a PhD in microbes. You just need a jar, a spoon, and the willingness to check in once a day like you are watering a plant that also wants carbs.

Bowls of whole wheat flour and bread flour next to a small pitcher of water on a clean kitchen counter

Why It Works

Accessible method: flour + water, measured by weight for consistency, with a simple no-scale volume option that uses the right flour-to-water balance.
Predictable timeline: a day-by-day plan so you know what “normal” looks like, including the awkward quiet days.
Reliable strength: we use a little whole wheat early on to kickstart activity, then switch to bread flour for a sturdy starter.
Real-life flexibility: room temp or fridge maintenance, plus what to do if you miss a feeding.

Pairs Well With

Storage Tips

Store Your Starter

At room temperature (daily baking): Keep your starter in a jar with the lid set on top (not tightly sealed). Feed it every 24 hours. If your kitchen is very warm and it peaks fast, you may need to feed every 12 hours.

In the fridge (weekly baking): Feed your starter, let it sit at room temperature for 1 to 2 hours to get a little active, then refrigerate. Feed it about once a week (or at least every 1 to 2 weeks). When you want to bake, pull it out and do 1 to 2 room-temperature feedings until it doubles reliably again.

To pause longer: Spread a thin layer of starter on parchment, let it dry completely, then crumble and store airtight.

To revive dried starter: Stir together equal weights dried starter flakes and water (for example, 10 g flakes + 10 g water). Let it soften for 30 to 60 minutes, then feed with equal weights flour and water. Keep it at room temp and feed daily for a few days until it starts rising strongly again.

A small jar of sourdough starter on a refrigerator shelf with a loose lid and a label showing the last feeding date

Common Questions

How do I know my starter is ready to bake with?

Your starter is ready when it doubles in volume in about 4 to 8 hours after a feeding at room temperature, with lots of bubbles and a pleasantly tangy, lightly yeasty smell. For a clean benchmark, look for doubling at roughly 1:1:1 (starter:water:flour by weight) at 70 to 75°F. The calendar matters less than the behavior.

My starter bubbled like crazy on day 2, then stopped. Did I kill it?

Nope. Early big bubbling is common and often comes from a temporary wave of bacteria. Keep feeding. Days 3 to 5 can feel quiet, then yeast activity ramps up again.

What flour should I use?

Use whatever you can keep consistent. I like whole wheat for the first couple days (more nutrients, faster activity), then bread flour for strength. All-purpose works too. Rye is a powerhouse if you have it.

Do I have to use filtered water?

If your tap water tastes strongly of chlorine, filtered water helps. Letting water sit out for a few hours can reduce chlorine, but it does not do much for chloramine (common in many cities). If your municipality uses chloramine, go filtered (carbon filter) or use bottled water.

What is the liquid on top?

That grayish liquid is called hooch. It means your starter is hungry. If it smells very boozy or sharp, pour it off, then feed. If it smells fine, you can stir it in and feed, but expect a slightly more sour vibe.

When is mold a deal-breaker?

If you see fuzzy growth (white, green, pink, black) or it smells like rotten garbage instead of tangy, toss it and start over. A little dark liquid (hooch) is not mold.

Can I keep a smaller starter?

Yes. You can maintain as little as 20 g starter by feeding with the same ratio. Small starter = less discard = happier you.

When is discard safe to use?

For the early days, treat discard like an experiment and compost it or toss it. Once your starter is reliably rising and falling and can double within 4 to 8 hours after a feeding (often around day 7 or later), discard is generally fine to use in cooked recipes like pancakes, crackers, or waffles.

What lid should I use?

Use a loose lid (resting on top) or a cloth cover with a rubber band. You want airflow, but not a tight seal. If your starter’s surface keeps drying out, switch from cloth to a loose lid.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

Digital kitchen scale (highly recommended)
Glass jar or deli container (16 to 32 oz is ideal)
Small whisk or spoon
Rubber band or dry-erase marker (to track rise)
Clean kitchen towel or lid set loosely on top

Jar note: Leave headspace. If your starter starts climbing like it is auditioning for an escape room, move it to a larger jar or discard and feed sooner.

Lid note: A loose lid is easiest. Cloth covers work too, but they can dry out the surface faster. Either way, do not seal it airtight.

The first time I made a starter, I treated it like a science project and a new roommate. I stared at it. I sniffed it. I gave it pep talks. Then on day three it went quiet and I assumed I had ruined everything. Classic.

Turns out, starters have a personality arc. They get loud, then moody, then they finally figure out who they are. Now I keep mine like a chill friend in the fridge and wake it up when I want a baking weekend. It is forgiving, a little wild, and it makes even a plain slice of toast feel like a flex.

Sourdough Starter

(4.8 Reviews)

Prep Time 10 mins

Cook Time 0 mins

Total Time 7 days (active time 10 to 15 mins)

Servings 1 starter (about 200 g by day 7)

Ingredients

Whole wheat flour: 100 g (for days 1 to 2)
Bread flour or all-purpose flour: about 300 to 500 g total for feedings (amount varies by discard and schedule)
Room-temperature water: about 400 to 600 g total

Optional (helpful, not required): 20 to 50 g rye flour to swap in for part of a feeding if your starter feels sluggish.

No scale? Here is the thing: equal volumes of flour and water are not equal weights, so 1/4 cup flour + 1/4 cup water makes a thin, over-hydrated starter.

Good-enough no-scale rule: Start with about 2 parts flour to 1 part water by volume, then adjust based on texture.

Volume disclaimer: These are approximations. Flour varies by type and how you scoop. If you can, spoon and level your flour (do not pack it), and use texture as the final boss.

Simple no-scale ratio: 1/2 cup flour + 1/4 cup water (stir, then adjust with a sprinkle of flour if it looks soupy, or a splash of water if it is dry)
Smaller option: 1/4 cup flour + 2 tablespoons water

Texture cue: aim for thick pancake batter or soft peanut butter. It should hold bubbles, not pour like a drink.

A jar, a bowl of flour, and a measuring cup of water arranged on a kitchen counter ready to start a sourdough starter

Instructions

Day-by-Day Starter

Big idea: We are building a stable culture by feeding it at a consistent ratio. This method makes a 100% hydration starter (equal flour and water by weight). Days 1 and 2 are just flour + water to get things going. Once you have starter to feed, we switch to the default 1:1:1 by weight (starter:water:flour), unless noted.

Temperature note: This timeline assumes about 70 to 75°F. If your kitchen is closer to 65°F, everything may take longer. If it is 78 to 82°F, your starter may peak faster and want 12-hour feedings sooner.

No-scale note: Volume measures are always a little fuzzy because flour compacts and starters vary in thickness. If you are measuring by cups and spoons, focus on the texture. You want a thick batter that can trap air, not a watery slurry. If in doubt, go slightly thicker.

Day 1

In a clean jar, mix 50 g whole wheat flour + 50 g water until smooth. Scrape down the sides. (No scale: about scant 1/2 cup flour + 1/4 cup water.)
Cover loosely (lid resting on top is perfect). Let sit at 70 to 75°F for 24 hours.

Day 2

You might see bubbles or a mild funky smell. Great. Day 2 can smell a little weird, like gym socks trying to become bread. That is normal.
No discard yet: we are building mass. Add 50 g whole wheat flour + 50 g water. Stir well, cover loosely, rest 24 hours. (No scale: about scant 1/2 cup flour + 1/4 cup water.)
If your jar is getting too full: discard half before feeding or move to a larger container.

A jar of sourdough starter with a rubber band marking the starting level on a kitchen counter

Day 3

Discard all but 50 g starter (yes, it feels wasteful. This keeps the colony strong and the jar manageable). (No scale: keep about 2 to 4 tablespoons, or a heaping 3 tablespoons. If it is super airy and bubbly, it may look like more. Go by the thick batter texture.)
Feed with 50 g water + 50 g bread flour. Stir, cover loosely, rest 24 hours. (No scale: stir in about 1/4 cup water, then add scant 1/2 cup flour. Adjust to a thick batter.)

Day 4

Discard all but 50 g starter. (No scale: about 2 to 4 tablespoons, aiming for thick batter.)
Feed with 50 g water + 50 g bread flour. Rest 24 hours. (No scale: about 1/4 cup water + scant 1/2 cup flour, then adjust texture if needed.)

Day 5

Discard all but 30 g starter. (No scale: about 1 to 2 tablespoons, or just enough to cover the bottom of the jar in a thick layer.)
Feed with 30 g water + 30 g bread flour. Mark the level with a rubber band. (No scale: about 2 tablespoons water and scant 1/4 cup flour, then adjust to thick batter.)
Check for rise over the next 6 to 12+ hours at 70 to 75°F (sometimes longer in cooler kitchens). A 25 to 50% rise counts as real progress. If it rises then falls, you are on track.

A jar of sourdough starter showing a bubbly surface with small and medium bubbles

Day 6

If your starter is rising and falling, start feeding twice a day for extra strength. If it is still very quiet, stick with once a day and keep it warmer.
Morning: discard to 30 g starter, then feed 30 g water + 30 g bread flour. (No scale: keep 1 to 2 tablespoons starter, then add about 2 tablespoons water + scant 1/4 cup flour. Adjust to thick batter.)
Evening: repeat the same feed.

Day 7

Feed your starter and watch the clock. If it doubles in 4 to 8 hours at roughly 1:1:1 in a 70 to 75°F kitchen, it is ready to bake with.
To prep for a bake, build a little more starter: keep 50 g starter, then feed 50 g water + 50 g flour and let it peak. (No scale: use the same thick-batter texture. Start with about 1/4 cup water + scant 1/2 cup flour, then add enough starter to land at thick pancake batter.)
Ready for the fridge after day 7? Feed it, let it sit at room temperature until you see some rise (about 1 to 2 hours, not necessarily doubled), then refrigerate.

Quick Fixes

No bubbles by day 4: Move it warmer, switch one feeding to half rye or whole wheat, and keep going.
Smells like nail polish or sharp alcohol: It is hungry. Feed sooner or increase the feeding ratio (try 1:2:2 for a day or two).
Watery layer on top: Hooch. If it smells very boozy, pour it off, then feed. Otherwise stir it in and feed.
Starter is rising but not doubling: Keep twice-daily feeds for 2 to 3 days, use bread flour, and aim for 70 to 75°F.
Very warm kitchen (78 to 82°F): Switch to 12-hour feeds earlier, or use a higher ratio like 1:2:2 so it does not burn through its food too fast.
Cool kitchen (65°F-ish): Give it time. Use a warmer spot (oven light on, microwave with the door cracked, or on top of the fridge) and expect the timeline to stretch.
Too runny to rise: Add flour at the next feed so it lands at a thick batter texture. A watery starter struggles to trap bubbles.

A spoon stirring sourdough starter in a glass jar on a kitchen counter with a light dusting of flour nearby

Nutrition information is estimated.

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Sourdough Starter

Why It Works

Pairs Well With

Recommended

Easy Sourdough Bread (No-Knead, Dutch Oven)

Same-Day Sourdough Bread

Sourdough Bread Machine Loaf

Rye Sourdough Bread

Storage Tips

Store Your Starter

Common Questions

Common Questions

How do I know my starter is ready to bake with?

My starter bubbled like crazy on day 2, then stopped. Did I kill it?

What flour should I use?

Do I have to use filtered water?

What is the liquid on top?

When is mold a deal-breaker?

Can I keep a smaller starter?

When is discard safe to use?

What lid should I use?

Sourdough Starter

Ingredients

Instructions

Day-by-Day Starter

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Quick Fixes