A homemade loaf deserves better than a plastic bag or a bare wire rack. Cloth has been the baker's ally for centuries, and linen in particular does something no cling film can: it lets a crust breathe while holding just enough moisture to keep the crumb from drying out. The bag itself takes an afternoon — or an hour, if you are confident at the machine — and costs little more than a metre of decent cloth. Here is how to make one properly.

Why linen beats plastic for keeping bread

Bread stales for two reasons. It loses water, which makes it hard, and its starch crystallises, which makes it dry and crumbly regardless of moisture. Plastic traps water, so the crust softens and the surface turns clammy, then mould appears within a few days. Paper is the opposite — it wicks moisture away and leaves you with a rock by Tuesday.

Linen sits happily in the middle. Its fibres absorb and release humidity slowly, so a loaf in a linen bag settles at a moisture level that keeps the crust crisp and the inside tender for two or three days. Tightly woven linen is also naturally resistant to dust and light, and it smells far better than a reused supermarket carrier bag sitting in a cupboard.

If you bake sourdough with a thick, dark crust, a linen bag is close to ideal. If you bake soft rolls or enriched buns, add a second layer or pop a piece of beeswax wrap over the top of the bag and it will stay soft for longer.

Choosing and preparing your fabric

Not all linen is equal for this job. Look for a tightly woven, mid-weight linen around 180–220 gsm. A loose weave lets crumbs escape and the loaf dry out; a heavy upholstery weight is stiff and hard to gather around a soft loaf. If you can see daylight clearly through the cloth when you hold it up, it is too open.

• Pre-wash and dry the linen before cutting. Linen shrinks — typically 5–8% — and it will shrink in the first wash after you have sewn it if you skip this step. Wash at 40°C with a little unscented detergent, tumble or line dry, then press while slightly damp.
• Check the grain. Tear a small strip across the width; it should rip in a straight line. If it pulls badly off-square, pull a single weft thread and cut along the gap.
• Thread and needle. Use a 90/14 universal or sharp needle and a good-quality cotton or linen thread. Linen thread is strong and traditional but can be stiff; a 40-weight cotton in a matching or contrasting colour is easier to handle.

Measuring and cutting a generous rectangle

The most common mistake is making the bag too small. A loaf needs room to sit loosely, and you need enough fabric at the top to gather into a proper neck. For a standard 800g–1kg round or oval loaf, cut a rectangle 32cm wide by 80cm long.

Folded in half across the width, that gives you a bag roughly 32cm × 38cm with a 3cm casing at the top. If you bake long batards, go to 90cm long. For a small cob or a couple of rolls, 28cm × 70cm is plenty.

Add 1.5cm seam allowance on the long sides and 1cm at the top and bottom. Cut with sharp dressmaking shears or a rotary cutter and mat, and keep the edges straight — pulled threads and wobbly lines show badly in a finished bag.

Sewing neat seams that will survive daily use

French seams are the right choice here. They enclose every raw edge, so the inside of the bag is clean, there is nothing to fray, and no loose threads end up stuck to your bread.

• Fold the rectangle in half lengthways with wrong sides together and pin along the two long edges.
• Sew down both long sides with a 7mm seam allowance, backstitching at each end. Trim any stray threads.
• Turn the bag inside out so the right sides now face each other. Press the seams flat, right into the fold.
• Sew again along the same two edges, this time with a 1cm allowance, which traps the first seam inside. Press.
• Turn the bag right side out and press the seams. You should have a smooth, flat, fully enclosed seam down each side.

If you prefer hand sewing, backstitch works well and looks handsome, but keep your stitches small and even — around 3mm — or the seams will gape when the bag is full.

Adding the drawstring casing

Turn the top edge under by 1cm and press, then turn it down again by 3cm to form the casing. Press that fold firmly; linen holds a crease beautifully, which makes the next step easy.

Stitch around the casing close to the lower folded edge, leaving a 2cm gap in one side to thread the cord. Then stitch a second line 5mm above it if you want a decorative double row — optional, but it strengthens the channel and stops the cord twisting.

For the cord, use 60–70cm of cotton drawstring, twisted linen tape, or a narrow braid. Attach a large safety pin to one end and thread it through, going in one side of the gap and out the other. Knot the two ends together securely, or finish them with a small wooden bead for a tidy grip. A simple overhand knot with the ends melted or whipped prevents fraying.

Using and caring for your bread bag

Shake out the crumbs after every loaf — a quick turn inside out over the bin is enough. Wash the bag by hand or on a gentle 30°C cycle every few weeks, and only when it genuinely needs it; frequent washing breaks down the fibres and softens the weave. Line dry, then press while slightly damp so it folds neatly in the drawer.

Keep two bags in rotation if you bake often. A bag that has held a fresh loaf and is left crumpled in a warm kitchen can develop a musty smell, and bread picks that up quickly.

Make one for yourself, then make three more in an evening — once you have measured and cut, they come together quickly. A linen bread bag is one of those small, unglamorous things that quietly improves the whole rhythm of a kitchen: less waste, better bread, and a cloth that grows softer and more handsome with every year of use.