Sourdough tools you need: the 7 essentials and what can wait

You need seven things to bake a good sourdough loaf: a scale, a bowl, a starter jar, a basket (or a bowl and towel), a bench scraper, a blade and a pot with a lid. Everything else makes it easier, and much of it is already in your kitchen.

The short list: a digital scale that reads in 1 g steps, a large bowl or clear tub, a quart jar for the starter, a 9 in banneton (or a bowl lined with a floured towel), a bench scraper, a lame or razor blade, and a 5 to 5.5 qt Dutch oven. For a first loaf, only the scale is hard to replace.

Each pick names the exact model we profile or a model bakers commonly buy, with what you can use instead. Start with the first group; add the rest when a bake shows you need it.

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The 7 essentials

3. Starter jar

Ball wide-mouth quart jar

32 oz (about 950 ml), wide mouth

Room for a 100 to 200 g starter to double, a mouth wide enough for a spoon, and clear glass so you can see the bubbles and the rise.

Already own something? Any clear jar of about 1 quart with a loose lid. Put a rubber band at the level after feeding.

4. Proofing basket

King Arthur Baking Round Brotform and Liner

About 500 to 800 g of dough (our estimate)

8.5 × 8.5 in
Drawn to its outside size

A basket holds the shaped loaf's shape while it proofs. For the common 900 g loaf, a 9 in round basket is the safest size; this 8.5 in one suits loaves up to about 800 g.

Already own something? A bowl about 8 to 9 in across, lined with a smooth kitchen towel dusted with rice flour.

6. Lame (blade)

King Arthur Two-in-One Bread Lame

Straight or curved blade

Straight or curved blade
King Arthur Two-in-One Bread Lame

A scored loaf opens where you cut it instead of bursting at the side. The curved setting gives the raised ear bakers look for.

Already own something? A new double-edged razor blade held at a low angle, or a very sharp serrated knife.

Makes it easier

Instant-read thermometer

ThermoWorks ThermoPop 2

Reads in 2–3 s, ±1°F

7 × 1.8 in
Drawn to its outside size

Tells you the water and dough temperature, which decides how long bulk takes, and the loaf's center temperature when it is done.

Already own something? Any probe thermometer that reads to 1°F.

Bowl scraper

Flexible plastic bowl scraper

Flexible plastic, curved edge

Gets every gram of sticky dough out of the bowl and helps with stretch and folds.

Already own something? A silicone spatula.

Dough whisk

Danish dough whisk

Stiff coiled wire on a wooden handle

Mixes flour and water into a shaggy dough without clogging like a balloon whisk.

Already own something? A wooden spoon or one wet hand.

When you bake every week

How we know: weights and sizes are the makers' published figures, linked from each product page, and a dough range marked “our estimate” is our arithmetic on them. We do not perform hands-on testing. How we compare.

What you can skip on day one

Your first loaf needs a scale, a bowl, a jar for the starter and an oven. A bowl and a floured towel stand in for a banneton, a razor blade for a lame, and a covered roasting pan for a Dutch oven. Buy the scale first: every sourdough recipe is written in grams, and a 10 g error in salt or starter is easy to make with spoons.

Buy the Dutch oven second. It makes the biggest single difference to how much a loaf rises and how its crust colours, and a 5 quart cast-iron pot is the size most recipes assume.

Temperature is the hidden tool

The same dough can finish bulk fermentation in 4 hours on a warm day or take nearly 8 on a cool one, depending on its temperature. A thermometer tells you which day you are having. Aim for dough at about 75 to 78°F (24 to 26°C) after mixing; the water temperature calculator tells you how warm the water should be to get there, and the bulk fermentation chart shows how long the rise takes at each temperature.

A proofing box is worth it once you bake every week in a cold or very warm kitchen. Before that, the oven with the light on and a thermometer does the job.

Match the tools to your dough weight

Most home sourdough recipes make one loaf of 750 g to 1 kg of dough. That loaf fits a 9 in round basket, a 10 to 12 in oval basket, and a 5 to 5.5 qt Dutch oven. If you double the recipe, you need two baskets and either two bakes or a bigger pot. Find your total dough weight with the baker's percentage calculator, then check the basket and pot with the banneton size calculator.

The common sourdough loaf and the tools it needs
Dough weightRound basketOval basketDutch oven
500 to 750 g8 in10 in4 to 5 qt
750 to 1,000 g9 in12 in5 to 5.5 qt
1,000 to 1,250 g10 in12 to 14 in6 to 7 qt

Nice to have later

A baking steel or stone, a second basket for a bâtard, a bread lame with replacement blades, linen couche cloth for baguettes, a proofing box, and a bread box or bag for storage. Add them when a recipe asks for them or a bake shows a gap, not because a list says so.

Where each tool comes in

Feed the starter in its jar the night before. Weigh flour, water, starter and salt on the scale, mix in the bowl, and let bulk fermentation run in the tub. Turn the dough onto the counter, divide and shape with the bench scraper, and proof it in the basket. Score it with the blade, bake it in the preheated Dutch oven, and cool it on a rack for at least an hour before slicing with the bread knife. The bread timeline planner works out when each step happens.

  1. Cool on a rack with air below the loaf.
  2. Crusty loaf for soon: choose breathable storage and accept some drying.
  3. Soft sandwich loaf for soon: wrap once cool to retain softness.
  4. Portions for later: slice, wrap airtight and freeze; thaw or toast as needed.
Storage choice follows the loaf and your next use, not a universal shelf-life countdown.

Questions bakers ask

What is the one tool to buy first for sourdough?

A digital kitchen scale that reads in 1 g steps. Every sourdough recipe is written in grams, and flour measured in cups can vary by 20% or more.

Do I need a Dutch oven for sourdough?

No, but it is the easiest way to get a tall loaf with a crisp crust. A baking sheet with a roasting pan turned over the loaf, or a baking steel with a tray of boiling water for steam, also works.

Do I need a banneton?

No. A bowl about 8 to 9 in across, lined with a smooth towel dusted with rice flour, holds a 900 g loaf just as well. A banneton gives the ringed flour pattern and dries the surface slightly, which helps scoring.

What size Dutch oven for sourdough?

A 5 to 5.5 qt round pot for the usual 750 to 1,000 g loaf; a 6 to 7 qt pot for bigger loaves. See Dutch oven sizes by dough weight.