What Is a Sourdough Proofing Basket? (Specs)

A sourdough proofing basket, or banneton, is a shaped support for dough during its final rise. It helps the loaf hold its form and can wick moisture from the dough’s surface. Typical round baskets measure 20–25 cm (8–10 in) across and may suit about 500–1,000 g of dough. They are not bakeware.

A basket’s size is only part of the fit. Its stated dough capacity, your recipe, and how much the loaf expands all matter. In this guide, I separate useful specifications from details that can mislead, then walk through preparation, proofing, release, and care.

What a sourdough proofing basket does

A proofing basket supports a shaped loaf during its final fermentation, also called proofing. It helps the dough keep a rounded or elongated shape while it rises. The basket does not bake the loaf, and it does not control fermentation on its own.

The basket is often called a banneton. A round one is sometimes called a brotform. Many baskets have ridges that leave a pattern on the dough, but that pattern is a surface effect, not a measure of proof quality. The main job is to support the dough and help manage surface moisture.

A basket can be used with or without a cloth liner. Without a liner, the dough can pick up the basket’s ridged pattern. A liner creates a smoother surface and can make release easier for some doughs. Either way, the basket is a support, not a sealed container. Cover the dough during proofing to limit drying.

Proofing basket specifications to compare

A basket’s useful specifications are its shape, inside dimensions, stated dough capacity, and care instructions. Diameter alone cannot tell you whether it suits a recipe. I compare the maker’s capacity claim with the dough weight I plan to proof.

Size, shape, and dough capacity

A typical round home basket is about 20–25 cm (8–10 in) across. Many home baskets are sold for roughly 500–1,000 g of dough, but that range is not a universal standard. Check the product’s stated capacity and whether the measurement refers to dough weight or finished loaf size.

The same dough weight can sit differently in baskets with different depths or shapes. A broad, shallow basket and a narrow, deep basket may both list the same diameter, yet support dough differently. If a maker lists only outside measurements, ask for inside measurements or a capacity guide.

These are shopping and workflow guides, not strict rules. A recipe may call for a different dough weight or timing. When in doubt, follow the basket maker’s instructions and the recipe’s guidance.

Basket material and liner

Rattan or cane baskets are traditional choices. Wood-pulp baskets are another option. Both are meant to support dough during proofing, not to withstand baking temperatures. There is no general oven-safe temperature rating for these materials.

A liner is optional. It can help reduce sticking, but it also changes how the basket interacts with the dough’s surface. If you use one, choose a clean, dry liner and follow its food-contact and care instructions. Do not assume that a liner makes the basket oven-safe.

Basket material does not provide meaningful heat diffusion or make the basket compatible with cookware or an oven. If a product is made from synthetic material, use it only as its manufacturer directs; do not assume it can go in the oven.

Preparing and using a proofing basket

Preparation means starting with a clean, fully dry basket and a light, even dusting of flour. This helps limit sticking and protects the basket from wet dough. Use a cover during proofing, and move the dough, not the basket, to the oven.

Step-by-step proofing

1. Check the basket. Make sure it is clean and completely dry. Brush away old flour or dough residue.
2. Dust the surface. Apply an even layer of rice flour, or a rice-flour and wheat-flour blend. Rice flour is often used because it helps reduce sticking. Do not oil the basket.
3. Add a liner if wanted. Use a clean, dry liner and dust it as needed. A liner is optional, not a required part of the basket.
4. Load the dough. Place the shaped dough seam-side up. Cover the basket so the dough’s surface does not dry out.
5. Proof to the dough’s response. At about 24–27°C (75–81°F), dough may proof in a practical home setting, but time varies. Use the recipe and look for the expected expansion and feel rather than relying on a fixed clock.
6. For a cold retard, cover and chill. Refrigeration at about 3–5°C (37–41°F) for around 8–16 hours is a common approach. The right time depends on the recipe, dough temperature, and how far fermentation has already progressed. Keep the covered basket away from uncovered foods.
7. Release the loaf. Turn the dough onto parchment or a peel before baking. If it sticks, ease it out gently rather than pulling hard on the dough.

A basket cannot tell you when proofing is complete. I use the recipe’s cues and the dough’s expansion as the decision points; the basket’s size and ridges are not substitutes for them.

Practical use scenarios

A use scenario shows how basket specifications affect a real home workflow. These examples apply the listed size and timing ranges, but they are not universal recipes. The dough formula, proofing conditions, and manufacturer’s directions still set the final choices.

Choosing a basket for a 750 g dough

For a dough batch weighing 750 g, I would look for a basket whose maker lists a capacity near that amount. A round basket measuring 20–25 cm (8–10 in) may be a useful starting point, but the capacity claim matters more than diameter alone. If the maker lists no capacity, check the inside size and reviews or instructions from the maker before buying.

Planning an overnight cold proof

For a cold retard, place the shaped dough seam-side up in the prepared basket, cover it, and refrigerate it. About 3–5°C (37–41°F) and 8–16 hours are common guide ranges, not a promise of a specific result. If the dough is already well fermented before chilling, it may need less time; if it is less developed, the schedule may differ. Follow the recipe and assess the dough.

When dough sticks at release

Sticking can result from a damp basket, insufficient dusting, wet dough, or residue left from earlier use. Turn the dough onto parchment or a peel, then release it gently. For the next proof, confirm the basket is dry, clean, and evenly dusted. A liner is another option, but it should also be clean and dry.

Cleaning, drying, and storage care

Care keeps dough residue and excess moisture from lingering in the basket. Brush out loose flour after use, then air-dry the basket fully before storing it. Follow the maker’s instructions for washing, and do not store the basket while damp.

After turning out the dough, remove loose flour and any visible dough with a dry brush. Let the basket air-dry in a ventilated place. Do not soak it or put it in a dishwasher unless the manufacturer specifically says that is safe for that product. Natural fibers may be damaged by unsuitable washing.

Do not seal a damp basket in airtight storage. Moisture and dough residue can encourage mold and off-odors, especially in the basket’s grooves. If mold or contamination persists after cleaning, discard the basket rather than using it for food.

Transfer, baking, and presentation

The basket’s job ends when the dough is released. Transfer the loaf to parchment or a peel, score it, and bake it on a preheated baking surface or in an oven-safe covered vessel. Put the dough in the oven, not the basket.

Rattan, cane, and wood-pulp baskets are not bakeware. Do not preheat them, place them on a hot surface, or put them in the oven. A basket may leave a decorative pattern on the dough, but it does not need to enter the oven for that pattern to remain.

If you want to serve bread in a basket, use a clean basket only after it is fully dry and free of dough residue. Do not use the proofing basket for serving while it is damp or still contains flour and raw dough.

FAQ: sourdough proofing basket specs

These answers cover the main buying and use questions: what the basket does, how to match capacity, and how to proof and care for it safely. Product instructions and recipe directions take priority when they differ from general ranges.

What is a sourdough proofing basket used for?
It supports shaped dough during its final rise and can wick moisture from the dough’s surface.

Is a banneton the same as a proofing basket?
Yes. “Banneton” is a common name for a basket used to support dough during proofing.

What size proofing basket do I need?
Check the maker’s stated dough capacity first. A typical round basket is 20–25 cm (8–10 in) across, but diameter alone does not confirm fit.

How much dough fits in a home proofing basket?
Many home baskets are sold for about 500–1,000 g of dough. Capacity depends on the product, so check the maker’s specifications.

Should I use a liner?
A liner is optional. Use a clean, dry liner if you want one, and follow its food-contact and care instructions.

What flour should I use to dust a banneton?
Rice flour or a rice-flour and wheat-flour blend is commonly used. Dust the basket evenly and do not oil it.

Can a sourdough proofing basket go in the oven?
Do not put a traditional rattan, cane, or wood-pulp basket in the oven. Transfer the dough to parchment, a peel, or an oven-safe vessel.

How long should dough proof in a basket?
There is no fixed time that fits every dough. Follow the recipe and judge expansion and dough response; temperature and fermentation level affect timing.

Can I refrigerate dough in a proofing basket?
Yes, as part of a covered cold-retard workflow. About 3–5°C (37–41°F) for roughly 8–16 hours is common, but recipe and dough conditions change the timing.

How do I keep a proofing basket from molding?
Brush out residue and air-dry it fully in a ventilated place before storage. Do not store it damp or sealed airtight while wet.

The simplest buying rule is to match the basket’s stated dough capacity to your recipe, then confirm the material and care directions. Use the basket for proofing only, and move the dough to an oven-safe surface for baking.

(This article was written by one of our staff writers, Julian R. Hayes. Visit our Meet the Team page.)