Your first sourdough loaf, day by day

Sourdough is a cycle, not a recipe. Here's what actually happens from the day you buy a scale to the day you slice your first real loaf — about a week, with a few hours of actual work spread across it.

By The JustBeginning Editors · Published May 8, 2026

The single biggest thing to know about sourdough before you start is that it’s an arc, not a recipe. You can’t speed it up. The starter has to grow on its own schedule, the dough has to ferment on its own schedule, and a thousand “no-knead in 4 hours” tutorials online are not actually sourdough — they use commercial yeast and shortcut the part that gives sourdough its character.

That sounds intimidating but it isn’t. The total active work across your first loaf is maybe two hours, spread over seven to eight days. Most of the time, the dough is just sitting there.

Here’s the day-by-day reality.

Day 0: The setup

Before you do anything, you need three things on your counter: a kitchen scale, a wide-mouth glass jar, and a 5-lb bag of King Arthur all-purpose flour. That’s it. Don’t buy a Dutch oven yet, don’t order a banneton, don’t think about a stand mixer.

round baked pastry on brown wooden chopping board with wooden spatula — Photo by Patryk Pastewski on Unsplash

Pick a spot for the jar. Room temperature, out of direct sunlight, somewhere you’ll walk past every day. The starter likes 70-78°F. Top of the fridge is usually too warm in summer; a windowsill is too cold in winter. A back corner of the counter is fine.

Days 1–3: The starter is just confused

Day 1. Put 50 grams of flour and 50 grams of water in your jar. Stir with the back of a spoon until smooth. Cover loosely (a coffee filter and a rubber band, or just the jar lid resting on top — never sealed). Walk away for 24 hours.

Day 2. Look at it. Maybe a few bubbles. Probably not many. The smell is faintly fermented, kind of like very mild beer. Take a clean spoon, scoop out most of what’s in the jar (you’ll throw this away — it’s called “discard”), and then feed the rest with another 50g flour + 50g water. Stir. Cover. Wait.

Day 3. This is the disappointing day. The starter smells weird — not necessarily bad, but vinegary, kind of like nail polish remover, sometimes a bit cheesy. The bubbling has slowed or stopped. New beginners panic here. Don’t.

What’s actually happening is that the wrong microbes — the ones that live on grain and tolerate clean conditions — got there first. They’re now dying off, and the wild yeasts and Lactobacillus bacteria that make real sourdough are arriving in their place. The smell is the changeover. Feed it again. Wait again.

Days 4–6: Recognizable life

By day four or five, the rhythm shifts. After each feeding, the starter rises predictably — half an hour to an hour to start, four to eight hours to peak, then a slow fall. The smell changes from weird-and-vinegary to bright-and-yogurty. Some people describe it as smelling like a sourdough bread you’d actually want to eat, which is the right idea.

This is also the boring middle. You feed daily, you discard, you feed again. Don’t rush it. Don’t bake yet. The starter needs a few cycles of feeding before it has the strength to leaven a loaf.

A quick way to tell when it’s ready: drop a small spoonful of starter into a glass of water. If it floats, the starter is mature enough to bake with. If it sinks, give it another day or two of feedings.

Day 7: First mix

Your starter floats. It doubles within 4-6 hours of being fed. You’re ready.

The first dough is the moment most people overthink. Don’t. Pick one recipe — we’d suggest the King Arthur “Naturally Leavened Sourdough” or the no-knead version of the Tartine country loaf — and follow it exactly. Don’t substitute flours, don’t change ratios, don’t add herbs or seeds. Bake the recipe, see what happens, then adjust on loaf two.

A typical day-7 schedule looks like this:

Morning (7-9am): Feed the starter. It needs to peak before you mix.
Late morning (10-11am): Starter doubles. Mix the dough — flour, water, salt, mature starter. Let it rest 30 minutes.
Afternoon (12-5pm): “Bulk ferment” — leave the dough alone for 4-6 hours, with two or three “stretch and folds” along the way (a one-minute task each).
Evening (5-7pm): Shape the dough into a round, drop it into a flour-dusted banneton (or a kitchen towel-lined bowl), cover, refrigerate overnight.

That’s the whole day. Maybe forty-five minutes of actual hands-on time, scattered.

Day 8: First bake

This is the easy part. Take the dough out of the fridge. While it sits, preheat your oven to 500°F with the Dutch oven inside for at least 45 minutes — this is non-negotiable, the bread relies on the cast iron being screaming hot.

Score the top of the dough with a sharp knife or razor. One curved slash an inch deep, off-center, is plenty. Lower the dough into the hot Dutch oven (parchment paper helps), put the lid on, slide it back in.

Twenty minutes covered. Twenty more minutes uncovered. Pull it out — the loaf should be deeply browned, almost too dark by your instincts. That’s correct. Underbaked sourdough is the most common beginner mistake.

two loaves of bread sitting on a rack — Photo by Dick Saunders on Unsplash

Cool the bread on a rack for at least an hour before you slice it. Especially the first one. The interior is still cooking from residual heat, and slicing too early gives you gummy crumb that makes you think the bake failed when it didn’t.

The first-loaf reality check

Your first loaf will almost certainly not look like Instagram. It might be denser than you expected. The crumb might be tighter, the rise smaller, the ear nonexistent.

That’s normal. What you’re looking at, in priority order:

Did it rise at all? If yes, your starter and bulk ferment worked. Everything else is fine-tuning.
Is the crumb open or closed? Big holes come with experience. Tight crumb on loaf one is fine.
Does it taste like sourdough? A faint tang is success. If it tastes like flat bread, your starter wasn’t quite ready.
Is the crust deep brown? It should be borderline burnt-looking on top. Pale crust = underbaked.

The one thing not to do is open Instagram and compare your loaf to someone’s seventh year of practice. You’re at hour zero of an arc that compounds for years.

What to do at loaf two

The temptation after a decent loaf one is to immediately tweak everything. Don’t. Bake the same recipe with the same flour for at least three more loaves before changing variables. Sourdough is sensitive — change two things at once and you can’t tell which one mattered.

A reasonable progression:

Loaves 1-4: Exact same recipe, learn what “ready dough” feels like in your hands.
Loaves 5-10: Vary one thing — slightly more water (higher hydration), a longer cold proof, a different flour.
Loaves 10+: Now you’re improvising. Bread flour, whole wheat blends, multi-day ferments, shaping techniques.

The whole curve takes a few months of weekly baking, which is a small price for a skill that gives you good bread on demand for the rest of your life.

Need to actually buy your kit? See our sourdough gear guide for the four things worth buying first and the things you don’t need yet.