Vegan Double Chocolate Buckwheat Brownie Cookies (Vegan, Gluten-free, Grain-free option, Nut-free)


Deeply chocolatey, fudgy and dense in the middle, and crisp at the edges, these cookies are a deliciously decadent treat that just so happen to be vegan, gluten-free, and really easy to make. Buckwheat flour adds a lovely nutty undertone to the dark and rich cocoa-packed batter, and generous chunks of vegan white chocolate provide pockets of vanilla-tinged sweetness.

A pile of double chocolate buckwheat brownie cookies, photographed from above. The cookies are a rich dark brown, with chunks of white chocolate peaking through the surface.

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If you have ever pondered over the possibility of combining the crisp outer shell and chocolate chip content of a cookie, with the dense and fudgy chocolate depths of a brownie, then look no further! These brownie cookies are darkly decadent, dangerously moreish and right at the intersection of cake and cookie.

I’ll be honest, I did not exactly intend to make brownie cookies. I wanted to make regular cookies with buckwheat flour, to see how they turned out. Buckwheat, despite its misleading name, is a actually a seed, and therefore gluten and grain-free. It is quite a heavy flour, but very nutritious, and has a distinctive nutty flavour which beautifully compliments dark chocolate. Using fairly standard cookie recipe proportions, with the addition of a flax egg to bind everything together, what emerged from the oven were these little gems. Half biscuit, half brownie and wholly delicious.

A double chocolate brownie cookie, split in half on a small plate, with a pile of cookies in the background. The outside of the cookie is crisp, but the inside is moist and fudgy, and there's a chunk of vegan white chocolate oozing at its center.

How to make double chocolate buckwheat brownie cookies

To begin with, you’ll need to make a flax egg. This is a simple combination of ground flax seeds mixed with a little water, which will thicken when left for a few minutes. It’s this gloopy texture which will help to bind your cookies together. It needs to be left for 5–10 minutes, so I do this first before gathering the rest of the ingredients.

In a large mixing bowl, sieve in all of the dry ingredients; the buckwheat flour (which you can find is most large supermarkets and health food shops), cocoa powder, baking powder and salt. Whisk these together so that everything is combined.

In a heat-proof bowl or saucepan, melt the vegan butter (I recommend using Naturli Vegan Block, but any vegan spread will do), then stir in some soft light brown sugar and vanilla essence. Roughly chop your vegan white chocolate into small chunks – Sainsbury’s Free From White Chocolate is excellent, and Tesco and Asda do a similar thing in smaller bars. Most vegan white and milk chocolate contains rice flour, so if you are grain-free you can substitute this with dark chocolate – a sweeter one such as Bournville would work well.

By this time your flax egg should be nice and gloopy, and ready to be stirred into the butter and sugar mixture. Make sure that your oven is hot and you have a baking tray ready, lined with baking paper or a silicone mat. Pour the wet ingredients (the butter mixture) into the dry ingredients, and stir until you have a thick batter, then stir in the white chocolate chunks until they are evenly distributed through the dough.

Scoop heaped tablespoons of mixture onto your baking tray, a few inches apart, until you’ve used up all the batter. You should get about 12 cookies. Then pop in the oven for 11–12 minutes.

The cookies are ready when the edges are firm to the touch, and there’s a little resistance when you poke them in the middle, though they’ll still feel quite soft. As you can see from the images, the cookies don’t spread very much. This is partly why they have a lovely fudgy center, but so you definitely have a cookie rather than a baked blob, as soon as you take the cookies out of the oven, slam the baking tray on your work surface or oven-top. This will help to flatten the cookies a little.

Leave to cool on the tray for 5 minutes, then transfer to a wire rack. They are particularly good on the first day they are made, but you can keep them in an airtight container for 2–3 days. Although, if your house is anything like mine, they are unlikely to last that long.

Half a double chocolate brownie cookie on a pink plate, with the remaining cookies in a pile to the left, next to a glass of non-dairy milk.

Please let me know if you give these a try! I would love to know what you think of them, and any feedback is appreciated. You can comment below, use the star rating at the top of the blog post, or tag me on Instagram or Twitter @greedybearbakes.

Vegan Double Chocolate Buckwheat Brownie Cookies

  • Servings: Makes 12
  • Difficulty: Easy
  • Print

Deeply chocolatey, fudgy and dense in the middle, and crisp at the edges, these cookies are a deliciously decadent treat.

Vegan, Gluten-free, Grain-free option, Nut-free

Ingredients

  • 1 heaped tbsp ground flax seeds
  • 3 tbsp water
  • 110g buckwheat flour
  • 40g cocoa powder
  • ¾ tsp baking powder
  • ½ tsp salt
  • 80g vegan butter (I use Naturli Vegan Block, but any vegan spread will do)
  • 80g soft light brown sugar (or light muscovado)
  • 1 tsp vanilla essence
  • 75g vegan white chocolate* (I use Sainsbury’s Free From)

Directions

  1. Pre-heat your oven to 175C fan and line a baking tray or sheet with some baking paper or a silicone mat.
  2. In a small bowl, whisk together 1 heaped tbsp ground flax seed and 3 tbsp water, and set aside.
  3. In a large mixing bowl, sieve 110g buckwheat flour, 40g cocoa powder, ¾ tsp baking powder, and ½ tsp salt, and mix until combined.
  4. Melt 80g vegan butter and stir in 80g soft light brown sugar, and 1 tsp vanilla essence. Roughly chop 75g vegan white chocolate. Stir the flax mixture (which should now be nice and gloopy) into the melted butter and sugar, then pour into the bowl with the dry ingredients. Mix until you have a thick batter, then stir in the white chocolate chunks until they are evenly distributed.
  5. Place heaped tablespoons of the batter on the prepared baking tray, a few inches apart (you should get about 12). Bake for 11–12 minutes, until the edges are firm and there’s a little resistance if you poke a cookie in the middle. Slam the baking tray on your work surface to flatten the cookies a little, then leave to cool for 5 minutes before transferring to a wire rack. These are particularly good if eaten the same day, but can be stored in an airtight container for 2–3 days.

Notes

*Most vegan white and milk chocolate contains rice flour, so for a grain-free option, substitute with dark chocolate – a sweeter one such as Cadbury’s Bournville would work well.

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