Choose firm block butter around 80% fat; low-fat tub spread adds too much water.
Certified gluten-free oat flour and tapioca bind a firm vegan cookie finished with a thin dark-chocolate drizzle.
The recipe card lists measured ingredients, numbered steps, storage guidance, and a nutrition estimate when available. Total time includes the listed preparation, rest, baking, and cooling periods for this recipe.
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Vegan Gluten-Free Oat 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
- microwave-safe bowl
- spoon
- 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 block butter and sugar until smooth. Whisk oat flour, tapioca, xanthan and salt together, then stir into the butter mixture. Check all ingredient labels for dairy and gluten and use clean equipment.
Shape and manage temperature
- Shape and manage temperature: Divide dough excluding chocolate into 24 portions, about 14 g. Press into 1 3/4-inch rounds, 1/4 inch thick. Chill 45 minutes for oat hydration.
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 18–22 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 22 minutes = 44 minutes.
Cool and finish
- Cool and finish: Rest 15 minutes on each tray, then cool 25 minutes on a rack. Melt chocolate in 20-second microwave bursts, stirring between bursts, and drizzle over cold cookies. Allow 30 minutes in a cool room to set; cooling includes the tray rest and setting.
Timing and scaling
- Timing and scaling: Active preparation is 30 minutes; required chill/rest is 45 minutes; whole-batch oven baking is 44 minutes; cooling/setting is 70 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
Oat flour absorbs moisture during the chill, while tapioca and xanthan support the delicate vegan crumb.
Technique & texture
Choose firm block butter around 80% fat; low-fat tub spread adds too much water.
Finishing & serving
Drizzle only fully cooled cookies so the dairy-free chocolate stays on the surface.
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 before powdered-sugar coating or chocolate drizzle, airtight between parchment layers. Thaw sealed at room temperature for 1–2 hours, then apply fresh coating. |
| Restoring | 2 hours | 1–2 hours thawing, then fresh finish. Thaw uncoated cookies sealed at room temperature. Add the recipe's powdered sugar or chocolate finish afterward; allow chocolate 30 minutes to set. Do not oven-reheat coated cookies. |
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 ordinary oats suitable for gluten-free baking?
No; use certified gluten-free oat flour and consider the recipient's ability to tolerate oats.
Can I replace block butter with coconut oil?
No; oil supplies a different water and solid-fat balance.
When should I drizzle after freezer storage?
Freeze these oat-flour cookies uncoated. Thaw sealed at room temperature and add fresh chocolate after the surface is dry.
Browse more cookie ideas in the Christmas Shortbread Cookies collection.
