Feed your starter as usual and watch how long it takes to mature. A ready-to-bake starter should:
- Mature in 4–6 hours at 26–30°C (79–86°F)
- Triple in size with lots of bubbles
- Show a wrinkled top as it begins to fall
- Smell pleasant, like yogurt, honey, or milk (a slight vinegar note is okay; no funky odors)
Once it’s ready, you can keep it at room temperature in a smaller jar (~200 mL / 7 oz) and reduce the amount of flour for feedings. Congratulations—you’re ready for the next step!