Vegan Oat Speculaas Cookies
I’ve been making a slab-baked version of speculaas for years because it’s fast, fuss-free, and perfectly crisp without any oil or eggs. These Vegan Oat Speculaas Cookies are a gluten-free, oil-free twist on the classic spiced biscuit — slice-and-bake from a single blended batter, great for holiday plates, lunchboxes, or whenever you want a warmly spiced snack. If you like hearty oat cookies, you might also enjoy a chewier take on classic oats in my oatmeal-raisin cookies: oatmeal-raisin cookies.
Why you’ll love this dish
These cookies hit a sweet spot: minimal hands-on time, pantry-friendly ingredients, and reliably crisp texture after a long bake. The speculaas spice mix gives a fragrant, slightly peppery warmth that’s more interesting than straight cinnamon. Because the batter is poured and baked in one sheet, it’s perfect for batch baking — no scooping or shaping needed.
“Crunchy, warmly spiced, and impossible to stop at one — the perfect easy holiday cookie.”
Reasons to try it:
- Fast prep: one blender, one baking sheet, and under a minute of active mixing.
- Budget- and pantry-friendly: oats, a little sugar, water, and whatever nuts or seeds you have.
- Allergy-friendly options: naturally vegan, easily made gluten-free, and oil-free.
- Crispy, long-keeping cookies that travel well for gifts or bake sales.
Step-by-step overview
This recipe is straightforward:
- Blend rolled oats with coconut sugar, nuts/seeds, water, spices, vanilla, and salt until silky.
- Stir in baking soda briefly.
- Pour onto a prepared rimmed sheet, smooth into an even slab.
- Part-bake, score into pieces, then finish baking until deep golden and crisp.
- Cool completely before separating the rectangles.
Expect about 45–50 minutes in the oven total (10 minutes, score, then 30–35 minutes), plus cooling time.
What you’ll need
- 1.75 cups rolled oats (use certified GF oats if needed)
- 1/2 cup coconut sugar (see notes for options)
- 70 grams nuts or seeds of choice (about 1/3 to 2/3 cup) — almonds, pecans, walnuts, or sunflower seeds work well
- 1.5 cups water
- 1.5 teaspoons speculaas spice combination (see notes below)
- 1 teaspoon vanilla extract
- 1/2 teaspoon salt
- 1/2 teaspoon baking soda
Notes and substitutions inline:
- Coconut sugar: gives a caramel-y flavor. Swap for light brown sugar (1:1) if unavailable. If using liquid sweeteners like maple syrup, reduce the water by 2–3 tablespoons to keep the batter thick.
- Nuts/seeds: grind to a smooth paste in the blender. Use sunflower seeds for a nut-free version.
- Speculaas spice: if you don’t have ready-made speculaas, mix 3/4 tsp ground cinnamon + 1/4 tsp ground cloves + 1/4 tsp ground ginger + pinch (1/8 tsp) each of nutmeg and white pepper or cardamom.
Step-by-step instructions
- Preheat the oven to 350°F (180°C). Grease a large rimmed baking sheet with nonstick spray or line it with parchment (preferred if keeping oil-free). I use an 18×13-inch half sheet pan for even edges.
- Add oats, coconut sugar, nuts/seeds, water, speculaas spice, vanilla, and salt to a high-speed blender. Do not add the baking soda yet.
- Blend until completely smooth, stopping and scraping the container down a few times. The batter should be pourable and lump-free.
- Add the baking soda and pulse a few seconds to combine. The soda helps the batter rise slightly and creates lift during baking.
- Pour the batter onto the prepared pan. Use an offset spatula or the back of a spoon to spread into an even layer. Lift and tilt the pan as needed so the batter reaches all corners. Aim for a uniform thickness so cookies bake evenly.
- Bake for 10 minutes. Remove the pan from the oven and immediately score into rectangles with a knife or pastry scraper. I cut 7 rows by 8 columns for 56 cookies, but you can do larger pieces.
- Return the pan to the oven and bake for another 30–35 minutes, or until the cookies are deep golden brown and feel firm to the touch. The surface will look dry.
- Remove the cookies that are done. If some center pieces still feel soft, keep them in the oven a few more minutes until crisp.
- Transfer the slab to a cooling rack and allow the cookies to cool completely before breaking apart along the scored lines. Cooling is critical — they crisp up as they cool.
Best ways to enjoy it
- Serve warm with a small cup of strong coffee or spiced chai — the spice mix pairs beautifully with hot drinks.
- Add to a cookie box or holiday platter alongside softer cookies for texture contrast.
- Crumble over dairy-free yogurt or porridge for added crunch.
- Pack in lunches or snack jars; they’re sturdy and travel well.
Storage and reheating tips
- Room temperature: store completely cooled cookies in an airtight container for up to 5 days. Add a sheet of parchment between layers to prevent sticking.
- Refrigeration isn’t necessary and can dry them out; only refrigerate if your kitchen is very hot and humid.
- Freezing: freeze single layers in a sealed freezer bag for up to 3 months. Thaw at room temperature for 30–60 minutes.
- Reheat briefly in a 325°F (160°C) oven for 5–7 minutes to refresh crispness, or microwave a single cookie for 10–15 seconds if you prefer it warm and slightly softer.
Helpful cooking tips
- Use a high-speed blender or food processor so the oats and nuts grind completely smooth; gritty texture can make the slab crumbly.
- Scrape the blender several times during blending to avoid streaks of unprocessed oats.
- Adjust thickness by spreading the batter thinner for crispier, faster-baking cookies, or slightly thicker for a chewier center (add 3–5 minutes to total bake time if thicker).
- When scoring, press firmly but don’t cut all the way through — you want clearly separated shapes but also a continuous slab so edges crisp uniformly.
- For nut-free households, substitute 70 g sunflower seeds and increase blending time; seeds can taste more bitter if over-processed, so stop as soon as smooth.
For tips on adjusting chewiness from a different oat-based recipe, I’ve used similar tricks in my oatmeal cookie guide: oatmeal-raisin cookies tips.
Creative twists
- Chocolate-studded: sprinkle vegan dark chocolate chips over the slab after the first 10-minute bake, then continue baking.
- Zesty speculaas: add 1 tsp orange zest to the batter for a citrus lift.
- Tahini swirl: dollop small teaspoons of tahini across the slab after pouring, then swirl quickly for a nutty ribbon.
- Cookie crusts: pulse cooled cookies into crumbs and use as a base for vegan cheesecakes or bars.
- Spicer or milder: double the white pepper for a traditional Dutch speculaas bite, or omit pepper for a kid-friendly cinnamon-forward cookie.
Common questions
Q: Are these cookies truly gluten-free?
A: They can be. Use certified gluten-free rolled oats and ensure your nuts/seeds and other spices are free from cross-contamination. Oats themselves are naturally gluten-free, but many facilities process barley/wheat.
Q: Can I replace the coconut sugar with maple syrup or honey?
A: You can use liquid sweeteners, but reduce the water by 2–3 tablespoons to keep batter consistency. Texture and flavor will change slightly — maple gives a softer chew and darker flavor. Honey isn’t vegan, so for vegan swaps prefer maple or agave.
Q: My cookies were soft in the middle after baking — what happened?
A: The center likely needed more time. Oven hot spots or a slightly thicker slab can cause uneven baking. Return the sheet to the oven for a few minutes and only remove pieces as they reach a deep golden color and feel firm. Cooling fully helps them crisp.
Q: Can I halve the recipe?
A: Yes — blend smaller quantities in a blender or use a food processor. Baking times may decrease slightly; watch the first 25–30 minutes after scoring.
Q: How long do they last crisp after baking?
A: Stored airtight at room temperature, they stay crisp for about 3–5 days. If humidity is high, crispness may degrade faster — briefly reheating in a low oven refreshes them.
Conclusion
If you want the original source version for comparison, see the powerhungry recipe for a very similar slab-baked speculaas: Vegan Oat Speculaas Cookies (Easy, GF, Oil-Free) | powerhungry®. For another oil-free, refined-sugar-free take on speculoos-style cookies, Sarah’s Vegan Guide offers a helpful variation: Vegan Speculoos Cookies (refined-sugar-free, oil-free) – Sarahs ….
Enjoy the warm spice — and remember: letting the cookies cool completely is the secret to perfect snap.
Vegan Oat Speculaas Cookies
Ingredients
Main Ingredients
- 1.75 cups rolled oats (use certified GF oats if needed)
- 0.5 cups coconut sugar Swap for light brown sugar (1:1) if unavailable.
- 70 grams nuts or seeds of choice (almonds, pecans, walnuts, or sunflower seeds) About 1/3 to 2/3 cup. Use sunflower seeds for a nut-free version.
- 1.5 cups water Reduce if using liquid sweeteners like maple syrup.
- 1.5 teaspoons speculaas spice combination If not ready-made, mix cinnamon, cloves, ginger, nutmeg, and white pepper or cardamom.
- 1 teaspoon vanilla extract
- 0.5 teaspoon salt
- 0.5 teaspoon baking soda
Instructions
Preparation
- Preheat the oven to 350°F (180°C). Grease a large rimmed baking sheet with nonstick spray or line it with parchment (preferred if keeping oil-free).
- Add oats, coconut sugar, nuts/seeds, water, speculaas spice, vanilla, and salt to a high-speed blender. Do not add the baking soda yet.
- Blend until completely smooth, stopping and scraping the container down a few times.
- Add the baking soda and pulse a few seconds to combine.
- Pour the batter onto the prepared pan and spread into an even layer.
Baking
- Bake for 10 minutes. Remove the pan from the oven and immediately score into rectangles.
- Return the pan to the oven and bake for another 30–35 minutes, or until the cookies are deep golden brown.
- Transfer the slab to a cooling rack and allow the cookies to cool completely before breaking apart.
