The Complete Guide to Starting Your First Sourdough Starter

Creating your first sourdough starter is one of the most rewarding experiences in home baking. This living culture of wild yeast and bacteria becomes your gateway to authentic, flavorful bread that connects you to thousands of years of baking tradition.

What you'll need

• Flour — whole wheat or rye to start (more wild yeast), then bread or all-purpose flour for maintenance
• Water — filtered or dechlorinated, at room temperature
• Container — glass or food-safe plastic; avoid metal
• Kitchen scale — accurate measurements matter more than you think
• Patience — five to seven days, sometimes longer

Day-by-day instructions

Day 1

Mix 50g whole wheat flour with 50g water. Stir well, cover loosely, and leave at room temperature (68–72°F is ideal). It will look like a thick paste.

Days 2–3

You may notice some bubbling and a slightly sour smell. Discard half and feed with 50g flour and 50g water. Stir well, cover loosely.

Days 4–5

The starter should be more active — visible bubbles, tangy aroma. Continue the discard-and-feed routine. You can switch to bread flour now for a milder flavor.

Days 6–7

Your starter should double within 4–8 hours of feeding and smell pleasantly yeasty. It's ready when it passes the "float test" — a small piece floats in water.

Troubleshooting

No activity — Try whole wheat flour, check water temperature, or move to a warmer spot.

Mold — If you see green, black, or pink growths, discard and start over. White bubbles are normal.

Hooch — The dark liquid on top is normal. Stir it in or pour it off before feeding.

Strong smell — Vinegary is fine. Cheese-like or putrid is not.

Maintaining your starter

Once established, refrigerate and feed weekly with equal parts flour and water. Before baking, bring to room temperature and feed two or three times until active and bubbly. Many bakers maintain starters for decades. Yours could outlive you.