Activate Your Starter
Simple, proven instructions to bring your dehydrated sourdough starter to life
Welcome to the beginning of your sourdough journey! You're about to bring a living culture to life, and I'm so excited for you. This starter has been carefully dehydrated and will become your baking companion for years to come.
Follow these tested instructions carefully, and in just a few days, you'll have an active, bubbly starter ready for baking. Don't worry—this process is foolproof when you follow the steps!
What You'll Need
Ingredients
- 10g dehydrated sourdough starter (from packet)
- All-purpose or bread flour (unbleached preferred)
- Filtered or bottled water (chlorine-free)
Equipment
- Two glass jars or containers (at least 16 oz each)
- Kitchen scale (recommended)
- Rubber band or tape (to mark height)
- Breathable cover (coffee filter, cloth, loose lid)
Important Tips for Success
- Temperature: Keep your starter in a warm spot (70-75°F is ideal). Too cold and it will be sluggish; too hot can harm it.
- Water: Use filtered, bottled, or tap water that's been left out overnight. Chlorine can inhibit fermentation.
- Patience: Every starter is different. Yours may be ready in 4 days or need 6-7. Watch for consistent doubling and bubbles!
Day-by-Day Instructions
Day 1: Rehydration
Morning or evening
- 1.Prepare your jar: Make sure it's clean and dry. I recommend a clear glass jar so you can watch the magic happen!
- 2.Add the dehydrated starter: Pour all 10g of the dehydrated starter flakes into your jar.
- 3.Mix with water: Add 25g (about 1.5 tablespoons) of room temperature filtered water. Stir well until the flakes soften and start to dissolve. Let it sit for 15 minutes to fully rehydrate.
- 4.Add flour: Add 25g of flour (about 3 tablespoons). Mix thoroughly until no dry spots remain. It'll be thick like peanut butter.
- 5.Mark and cover: Use a rubber band or tape to mark the height of your mixture. Cover loosely with a coffee filter, cloth, or loosely placed lid (needs airflow!). Place in a warm spot (70-75°F).
What to expect: You might see a few small bubbles within 12-24 hours, but don't worry if nothing happens yet. The yeast is just waking up!
Day 2: First Feeding
Same time as Day 1
- 1.Prepare your second jar: Make sure your second clean jar is ready. You'll be transferring to a fresh jar for each feeding to ensure accurate measurements.
- 2.Measure 25g of starter: Scoop 25g (roughly 2 tablespoons) of your starter from Day 1 and transfer it to the clean jar. You can discard or compost the rest.
- 3.Feed it: Add 25g water and 25g flour to the 25g starter in your clean jar. Mix thoroughly until smooth.
- 4.Mark, cover, and wait: Mark the new height, cover loosely, and return to your warm spot.
What to expect: You should see more bubble activity and slight rise. The smell might be a bit off (tangy, even slightly funky)—this is normal as good bacteria establish themselves!
Day 3: Building Strength
Same time as previous days
- 1.Switch jars again: Clean your first jar (the one from Day 1) and have it ready.
- 2.Transfer 25g of starter: Measure 25g from your Day 2 jar and transfer it to the clean jar. Discard or compost the rest.
- 3.Feed and mix: Add 25g water and 25g flour. Mix thoroughly until fully incorporated with no lumps.
- 4.Mark, cover, and wait: Same routine as before!
What to expect: More consistent bubbling and rise. The smell should start improving—getting more pleasant and yeasty. You might see it double in size, but it may still collapse before the next feeding.
Day 4: Getting Active
Same time as previous days
- 1.Continue the 2-jar method: Switch back to your second clean jar. Measure 25g from your Day 3 starter and transfer it to the clean jar.
- 2.Feed: Add 25g water and 25g flour. Mix thoroughly.
- 3.Observe closely: Check every few hours to see when it doubles. This timing will help you understand your starter's rhythm.
What to expect: You should see consistent doubling within 4-8 hours of feeding. Lots of bubbles! Pleasant, slightly tangy smell like yogurt or beer. The texture should be airy and fluffy.
Day 5 & Beyond: Ready to Bake!
Ongoing maintenance
Is Your Starter Ready?
Your starter is ready to use when it consistently:
- Doubles in size within 4-8 hours of feeding (at room temperature)
- Has lots of bubbles throughout (not just on top)
- Smells pleasantly tangy and yeasty (not overly sour or funky)
- Passes the float test (see below)
The Float Test
Drop a small spoonful of starter into a glass of water. If it floats, it's ready to bake! If it sinks, give it another feeding and try again later.
Ongoing Care
- Baking multiple times a week: Feed once or twice a day and keep at room temperature.
- Baking once a week: Keep in the fridge and feed once a week. Take it out 2-3 feedings before baking.
- Long break: You can refrigerate for 2-3 weeks, or dehydrate for long-term storage!
Troubleshooting
No bubbles after 2-3 days?
Your environment might be too cold. Try moving it to a warmer spot (near a lamp, on top of the fridge, or in a slightly warm oven with just the light on). Be patient—some starters take longer than others!
Smells really bad (like nail polish remover)?
This is common in the early days as bacteria compete. Keep feeding on schedule and the smell should improve by Day 4-5. If it persists beyond Day 7, reach out to me!
Liquid on top (hooch)?
This grayish liquid means your starter is hungry. Just stir it back in and feed as normal. If you see it often, try feeding more frequently or with larger amounts.
Mold or pink/orange discoloration?
Discard and start over. Mold means something got contaminated. Make sure your jar and utensils are clean, and your water is chlorine-free. Contact me for a replacement if needed!
I'm Here to Help!
Questions? Concerns? Just want to share your first loaf with me? I'd love to hear from you! Reach out anytime for sourdough advice, recipe ideas, or troubleshooting help.
Happy Baking!
Your sourdough journey is just beginning, and I can't wait to see what you create. Tag me in your bakes—I love seeing them!