How to make a sourdough bread starter
The sourdough infatuation shows no sign of letting up here. How about you? Were you one of the countless bakers who took to the challenge of making their own bread this past year? Did you spend hours one Saturday night watching YouTube videos on getting the best rise from your loaf? (don’t judge!) Have you been feeling a little left out, and are yet to jump on the sourdough bandwagon? Now’s your time. Let’s talk about how to make a sourdough starter.
What is a sourdough starter?
Essentially, a sourdough starter is flour and water combined, and let sit to allow natural yeasts & bacteria in the air to ferment and develop into a thick liquid.
No two starters are the same, and they will smell different at different stages. In the first few days of making my last starter, it smelt like nail polish remover. While it’s doesn’t smell great, it’s completely normal and a sign of a healthy starter!
There are many ways to go about making a sourdough starter. You could beg, borrow, or steal a starter from someone. Purchase a dehydrated starter to give you a bit of a head start, or start from scratch. Personally, I’ve tried all three in my sourdough experience (this isn’t my first rodeo!). Most winters I get back into making sourdough, but when summer rolls around, life becomes a little too crazy to keep it going! To be honest it really doesn’t matter which way you start. All three will work just fine. But if you want to take the DIY road, let’s talk about how to make a sourdough starter.

What you need to get started
- A clean glass jar – I love Kilner jars and was recently gifted this beauty above by Kilner Australia. It’s part of their sourdough making kit and it works a treat! I’ve always used a glass jar because i can see how active my starter is and easily see how much it’s risen.
- Bread flour (or flour of choice)
- Filtered water (or pre boiled and cooled tap water)
- Electronic scales
- Spoon
- Elastic band
Ok, lets do this…
It generally takes at least 7 days to make a sourdough starter from scratch. Most of the time though, I find that it takes me a little longer (up to 14 days) till I’m completely happy to start baking with it. This could be because I tend to bake more in Winter (and our Winters are COLD) or because I sporadically bake bread, there are not as many wild yeasts floating around my house.
Day 1
In your super clean glass jar, mix even parts water and flour. Because we are just starting I recommend starting small. 50g flour / 50g water is perfect and it’s less waste later on. When thoroughly combined, scrape down the sides of you jar, loosely cover, and pop on the bench out of direct sunlight for 24hours.
Days 2, 3
Feed your starter with 50g flour and 50 ml water. Mix well, scrape down the sides, cover, and rest in a warm-ish spot for 24 hours.
Days 4, 5 , 6
Discard half the starter. Feed your starter with 50g flour and 50 ml water. Mix well, scrape down the sides, cover, and rest in a warm-ish spot for 24 hours. At this stage, I also put a rubber band around the jar at the height my starter is. It’s a great way of measuring when the starter is at its peak and had doubled in size.
Day 7
By this stage you may have a beautiful, active starter, full of bubbles, that is consistently doubling in size after each feed. If not it may require a few more days of love and attention. Repeat steps in days 4-6 until you see an active, bubbly, and ready-to-bake starter!

Keeping your starter alive
Now that your starter is alive and kicking, you need to feed it daily…
Discard half the starter. If you are changing jars, I use about 50g starter (roughly 2 tbsp). Feed your starter with 50g flour and 50 ml water. Mix well, scrape down the sides, cover, and rest in a warm-ish spot for 24 hours.
What’s Next?
The big question is are you going to name your starter? Now obviously this is completely optional. I have found when I name it, I take a bit better care of it. Mine is called Billy Bob The Bread Starter. What’s yours?
Now you are armed with your active starter, your sourdough world is your oyster. You’ll constantly be looking at ways to include sourdough starter in your baking. Maybe the odd Saturday night will be spent learning tips on YouTube! It’s kinda addictive. Warning you now!
Tip. Don’t throw out the discarded starter. Some of my favourite ways to use it up (instead of wasting it)are…
- breadsticks / seeded crispbread
- banana bread – one word. obsessed.
- pancakes
Ok, now go forth and bake (break) lots of bread
x
Love baking? Me too. Here’s a couple of my favourite baking recipes
- Spiced Apple Cider Doughnuts
- Apple & Walnut ANZAC Crumble
- Maple White Chocolate Cookies
- Why I’m in love with cold oven bread baking
THIS POST IS IN COLLABORATION WITH KILNER AUSTRALIA & BAKEMASTER AUSTRALIA. TWO BRANDS I LOVE AND ADORE. ALL OPINIONS ARE 100% MY OWN.
Print
How to make a sourdough bread starter
- Prep Time: 35 minutes
- Total Time: 35 minutes
- Category: bread
- Cuisine: Australian
Description
The first step in your sourdough journey… How to make a sourdough starter from scratch
Ingredients
- 350 g Bread Flour
- 350 g Water (filtered or boiled then left to cool)
Instructions
- Day 1 In your super clean glass jar, mix even parts water and flour. Because we are just starting i recommend starting small. 50g flour / 50g water is perfect and it’s less waste later on. When thoroughly combined, scraped down the sides of you jar, loosely cover, and pop on the bench out of direct sunlight for 24hours.
- Days 2, 3 Feed your starter with 50g flour and 50 ml water. Mix well, scrape down the sides, cover and rest in a warm-ish spot for 24 hours.
- Days 4, 5, 6 Discard half the starter. Feed your starter with 50g flour and 50 ml water. Mix well, scrape down the sides, cover and rest in a warm-ish spot for 24 hours. At this stage i also put a rubber band around the jar at the height my starter is. It’s a great way of measuring when the starter is at it’s peak and had doubled in size.
- Day 7 By this stage you may have an beautiful, active starter, full of bubbles, that is consistently doubling in size after each feed. If not it may require a few more days love and attention. Repeat steps in days 4-6 until you see an active, bubbly, and ready to bake starter!
Notes
Don’t be discouraged if your starter isn’t ready to go on day 7. Most of the time though, i find that it takes me a little longer (up to 14 days) till i’m completely happy to start baking with it. This could be because i tend to bake more in Winter (and our Winters are COLD) or because i sporadically bake bread, there is not as many wild yeasts floating around my house.
Keywords: Bread, Sourdough