Laminated Potato Bread
The russet potato bread is a lean dough. No enrichment — just potato, water, flour, yeast, and salt. That leanness made it the right candidate for lamination testing. The question was simple: could a fixed butter block hold through a long bake without weeping? The potato dough answered it. Three folds, 384g block, 350°F for two and a half to three hours. Zero weeping. That result set the architecture. A fixed 384g butter block against a 1,562g lean dough base, totaling 1,946g, became the system. The potato dough did not just make a good loaf. It proved a method.
The cooked riced potato does something specific in this dough. The gelatinized starch holds water tightly and gives the dough a particular extensibility — it stretches far without tearing. That quality is what a laminated dough needs. You can roll it thin without punching through the butter layer. The layers stay intact. The crumb opens up in the oven and the butter does its job in every fold.
This is a long bake. Two and a half to three hours at 350°F. Pull it when the internal temperature reads 200 to 205°F.
Potato weight is taken after the potato has cooled completely. Weigh the whole cooked potato skin on before ricing. The moment the skin breaks, moisture escapes. The weight before ricing is the formula weight.
| Ingredient | Grams | Baker's % | |
|---|---|---|---|
| Base Dough | |||
| All-Purpose Flour | 564 | 100.00% | |
| Russet Potato (cooked, skin on, weighed before ricing) | 564 | 100.00% | |
| Potato Water (reserved) | 251 | 44.50% | |
| Butter (in dough) | 36 | 6.38% | |
| Salt | 13 | 2.30% | |
| Instant Yeast | 11 | 1.95% | |
| Lamination Block | |||
| Butter (lamination) | 384 | 68.09% | |
| Total | 1,946 | 323.22% | |
Mix the dough the day before you plan to bake. It needs overnight refrigeration to firm up enough for lamination. On bake day, the butter block and the dough need to be the same temperature — cold but pliable, around 60°F. If the butter cracks when you bend it, it is too cold. If it squishes out during rolling, it is too warm. Butter temperature is the single variable that determines whether lamination works.
Line the 15×4.75×4.75 pan with parchment and set it on a sheet pan — the butter block will render during the long bake and pool in the pan. Set the oven to 350°F when you are ready to bake.
Rice the potato while it is still hot. It releases steam as it dries and the texture stays light. Weigh the whole cooked potato skin on before you break it open. That is the formula weight.
Boil or steam one large russet potato until fully cooked through. Let it cool completely. Weigh the whole potato skin on — that is your formula weight. Break the skin and rice the potato immediately into your mixing bowl.
Add the flour, yeast, and salt. Add the potato water on top.
Mix on low until combined, then increase to medium and mix 8 to 10 minutes until smooth and pulling from the sides. The dough will be soft and slightly tacky. Do not add flour.
Mix until no dry patches remain. Cover and rest 30 minutes. Stretch and fold once. Cover again.
Add the butter in small pieces and mix until fully incorporated. Pat the dough into a flat rectangle roughly the width of your loaf pan. Wrap tightly in plastic and refrigerate overnight, minimum 8 hours.
Butter block: beat 384g of cold butter flat between two sheets of parchment to approximately 6×8 inches and about a half inch thick. Wrap and refrigerate alongside the dough.
Roll the cold dough on a lightly floured surface to about 8×16 inches. Place the butter block on the center two-thirds. Fold the bare third over the butter, then fold the remaining third on top. Press edges to seal. Rotate 90 degrees, roll out to 8×16 again, and repeat the letter fold. Wrap and refrigerate 20 minutes. Repeat for a total of three folds. Brush off excess flour between every fold — trapped flour creates dry pockets. After the third fold, refrigerate at least 30 minutes before shaping.
Roll the laminated dough into a rectangle the width of the pan and about 12 inches long. Roll it toward you into a tight log and place seam side down in the parchment-lined pan. Or divide into quarters, roll into tight balls, and place on their sides in the pan for a pull-apart crown.
Cover loosely with plastic wrap and rest at room temperature until the dough crowns 1 inch above the rim. At 72°F plan 2 to 3 hours. The dough should feel light and jiggly when you nudge the pan. Do not rush the proof — under-proofed laminated dough blows out in the oven.
Set the loaf pan on the sheet pan. Bake at 350°F for 2.5 to 3 hours. Rotate at 75 minutes. Internal temperature 200 to 205°F. Tent loosely with foil after 90 minutes if the top is coloring ahead of the interior. Remove from the pan after 10 minutes and cool on a wire rack at least 45 minutes before slicing. The layers need time to set — cutting too early compresses them.
Wrap in plastic and store at room temperature for 3 to 4 days. The potato crumb holds moisture well — day two and day three are excellent. Slice and freeze for up to a month. Toasts well from frozen.