Simple Sourdough Starter Recipe: Your Key to Perfect Bread

There is nothing quite like the smell of freshly baked sourdough bread, but every good loaf starts with a healthy, active starter. This guide focuses on the practical side of building and maintaining a sourdough starter at home, including how temperature, timing, and feeding affect activity.

Want the exact numbers? My sourdough calculator works out starter feedings by ratio and dough hydration with baker’s percentages, in grams.

Sourdough starters are especially sensitive in cooler kitchens, and many problems come down to environment rather than technique. This recipe walks you through creating a reliable starter, how to recognize when it is ready to use, and how to store it for everyday baking.

Once your starter is active, you can put it straight to work in my sourdough bread recipe.

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Key Tips Before You Begin

• Temperature matters more than anything else
• Sourdough starters are slow in cool kitchens. Aim for a warm, stable spot and do not judge progress too early.
• Consistency beats perfection
• Feed your starter at roughly the same time each day using the same flour and water. Small variations are fine.
• Clean, not sterile
• Use clean jars and utensils, but do not overthink it. Normal kitchen cleanliness is enough.
• Water and flour do not need to be complicated
• Plain flour and non-chlorinated water are sufficient to get started. You can refine things later once the starter is active.
• Activity takes time
• It is normal for a starter to take 5-14 days to become reliable. Lack of bubbles in the first few days does not mean failure.
• Smell and movement are your indicators
• A healthy starter smells lightly tangy and shows bubbles or rise after feeding. Strong unpleasant smells or visible mould mean it is best to restart.

How a Sourdough Starter Works

A sourdough starter is a living mixture of wild yeast and lactic acid bacteria that feed on the flour you add. The yeast produces carbon dioxide, which makes bread rise, while the bacteria create acidity that develops flavour and keeps the starter stable.

Three factors matter most:

• Food
  Flour provides the sugars and nutrients the microorganisms need. Wholemeal or malted flour can help early activity, but plain flour works once the starter is established.
• Temperature
  Starters are most active in warm, stable conditions. Cooler temperatures slow fermentation, which is the most common reason a starter appears inactive.
• Consistency
  Regular feeding and a stable environment allow the yeast and bacteria to stay balanced. Irregular feeding or temperature swings can slow activity or weaken the starter.

You may sometimes see a dark liquid on top of your starter. This is called hooch and simply means the starter is hungry. It is harmless and can be poured off or stirred back in before feeding.

That is all the science you need to get started.

Storing Your Sourdough Starter in the Fridge

Once your starter is active and reliable, storing it in the fridge is a practical option if you bake once a week or less. Cold storage slows fermentation and reduces the need for daily feeding.

My Weekly Storage Method

• Keep the starter in the fridge between bakes
• Once a week, remove 100 g of starter into a bowl
• Feed it with 50 g flour and 50 g water
• Mix well and leave it at room temperature for 3 hours or overnight until active
• Feed the remaining starter in the jar with 50 g flour and 50 g water, then return it to the fridge

This keeps the main starter healthy while giving you an active portion ready for baking.

Longer Storage

A sourdough starter can usually stay in the fridge for up to a month without feeding. You may see a layer of liquid (hooch) on top - this is normal and simply means the starter is hungry.

If reviving a starter that has been stored for a long time:

• Discard the liquid
• Transfer the starter to a clean jar
• Feed it normally and allow a day or two to regain strength

With regular feeding and stable storage, a starter can recover even after extended time in the fridge.

Equipment You’ll Need

Starting a starter needs almost nothing, but these matter

A Closer Look at the Ingredients

A sourdough starter really only needs two things (plus time):

• Flour wholemeal or rye to get it going (lots of wild yeast), then white flour to keep it.
• Water lukewarm, and non-chlorinated if you can, as chlorine can slow things down.
• Warmth and patience not ingredients as such, but the two things that matter most.

Recipe Card for Sourdough Starter

Troubleshooting

The starter is very slow even after several days
Slow progress usually points to a cool environment rather than a mistake. Move the starter to a warmer spot and keep feeding on schedule. Patience is often the missing ingredient.

My sourdough starter is not bubbling or rising
This is most often caused by temperature. Starters are slow in cool kitchens and may appear inactive even when they are healthy. Keep the starter in a warm, stable place and give it time after feeding. While written with winter kitchens in mind, this winter proofing guide is useful year-round whenever fermentation feels sluggish.

The starter smells unpleasant or harsh
A healthy starter should smell lightly tangy or yeasty. Strong unpleasant smells usually mean the starter needs more regular feeding or warmer conditions. Feed it consistently for a few days and reassess. If mould appears, discard and restart.

Liquid (hooch) forms on top
Hooch is a sign that the starter is hungry. It is harmless. Pour it off or stir it back in, then feed the starter as usual.

The starter rises once, then stops
Early activity is common and does not always mean the starter is ready. This is normal. Continue feeding regularly and focus on temperature and consistency rather than speed.

FAQ for Sourdough Starter

How long does it take to make a sourdough starter from scratch?

Usually 5-7 days of daily feeding, though it can take up to 10-14 days in a cold kitchen before it is active and doubling reliably.

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

It should double within 4-8 hours of feeding, look bubbly and domed, and smell pleasantly sour. The float test - a spoonful floating in water - is a handy check.

How often do I feed it?

Once a day at room temperature while establishing it, then once a week once it lives in the fridge. Bring it back to room temperature and feed it the day before baking.

What is sourdough discard and can I use it?

Discard is the portion you remove before feeding. Do not bin it - use it in my sourdough focaccia or other bakes.

My starter is not rising - what went wrong?

Most often the kitchen is too cold or it just needs more time. Keep it warm (around 24-26C), feed consistently, and be patient - my dough-not-rising guide digs into this.

A Few Words from the Chef

Building a sourdough starter is less about precision and more about attention. Small variations are normal, and progress often comes in stages rather than on a fixed schedule.

Once your starter is active and reliable, you can use it straight away or store it for future baking. It works naturally with my sourdough bread recipe, and it is also excellent for softer, high-hydration bakes like sourdough focaccia.