Use potato starch, not potato flour; flour contains the whole potato and absorbs differently.
Potato starch and cake flour produce a particularly fine, melting crumb without the whipped method.
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Potato-Starch Vanilla Christmas Shortbread Recipe
Follow the tray sizes, portions and baking intervals in the instructions below.
Total time includes hands-on preparation, required chilling or resting, whole-batch cooking, cooling and finishing.
Kitchen tools you’ll need
- mixing bowl
- mixer
- kitchen scale
- two 13 x 18-inch half sheets
- parchment
- wide spatula
- cooling rack
Ingredients
US measures are approximate. Gram weights help keep portions consistent; spice weights vary with density.
Instructions
Mix the dough
- Mix the dough: Beat butter and powdered sugar just until smooth, about 30 seconds; do not whip. Add vanilla, then sifted cake flour, potato starch and salt. Press the loose clumps together.
Shape and manage temperature
- Shape and manage temperature: Divide into 24 equal portions, about 14 g. Flatten into 1 3/4-inch rounds about 1/4 inch thick and dock lightly. Refrigerate the shaped cookies for 20 minutes until firm.
Bake the whole batch
- Bake the whole batch: Heat oven to 325°F (165°C) conventional or 300°F (150°C) fan. Arrange cookies on two parchment-lined 13 x 18-inch half sheets, 12 cookies per tray, with at least 1 inch between edges. Bake one tray at a time on the middle rack, keeping the waiting tray refrigerated for 16–20 minutes, rotating front to back once, until the edges and bases are lightly golden and the centers look dry. Whole-batch cookie baking is 2 trays x up to 20 minutes = 40 minutes.
Cool and finish
- Cool and finish: Rest 10 minutes on each tray, then cool 20 minutes on a rack before serving or packing. Cooling includes the tray rest.
Timing and scaling
- Timing and scaling: Active preparation is 20 minutes; required chill/rest is 20 minutes; whole-batch oven baking is 40 minutes; cooling/setting is 30 minutes. Cooling allowance runs from the final tray; earlier trays may cool during later baking and that overlap is not counted again. Start with butter at the stated consistency; ingredient warm-up and frozen-dough thawing are extra. Oven preheating can overlap shaping or chilling. Scale every ingredient weight but keep piece dimensions, oven temperature and per-tray bake range unchanged; extra trays increase whole-batch time.
Chef’s Science & Pro Tips
Ingredient science
Potato starch dilutes the low-protein cake flour for a fine, fragile crumb.
Technique & texture
Use potato starch, not potato flour; flour contains the whole potato and absorbs differently.
Finishing & serving
Let the cookies rest on their trays before moving them so the starch-rich structure can firm.
Storage and make-ahead
| Method | How long | What to do |
|---|---|---|
| Room temperature | 5 days | Up to 5 days. Store completely cooled cookies airtight in a cool, dry room, with parchment between layers. Keep away from moist filled cookies. |
| Refrigeration | up to 7 days | Unnecessary; up to 7 days if needed. Baked refrigeration is unnecessary for these unfilled cookies and may soften the crumb. If the room is warm, seal airtight and bring to room temperature while still covered. |
| Raw freezing | 1 month | Up to 1 month. Freeze wrapped dough or unbaked portions airtight. Thaw covered overnight in the refrigerator; shape as directed, then complete any stated post-shaping chill. Do not add thaw time to the fresh-batch timings. |
| Baked freezing | 2 months | Up to 2 months. Freeze fully cooled cookies airtight with parchment between layers. Thaw in their sealed container at room temperature for about 1–2 hours. |
| Restoring | As described | Serve after thawing; optional 3–5-minute refresh. For plain unfilled cookies only, refresh at 300°F (150°C) conventional or 275°F (135°C) fan for 3–5 minutes, then cool 20 minutes before sealing. This is extra time beyond the fresh recipe. |
Notes
- Scale ingredients, including US measures, without changing cookie size or oven temperature. Extra trays increase whole-batch time.
Nutrition
Approximate values per portion from the listed ingredient weights divided into 24 equal portions. Includes required fillings and finishes. Brands, unused coatings and actual portion size affect the estimate.
Frequently Asked Questions
Are these the existing whipped shortbread recipe?
No; the butter is beaten briefly and the flour system is cake flour plus potato starch.
Can potato flour replace potato starch?
No; it would change flavor and water absorption substantially.
Are these gluten-free because they contain potato starch?
No; the 113 g cake flour is wheat flour.
