I’m really excited to share this cake because it took a few experiments to get it right.
It uses an unusual ingredient which makes it light and spongy.
Mashed potato.
Yes, there is mashed potato in this cake but I promise you would never know it.
It tastes just like a traditional vanilla sponge and has the same lightness too.
Yet it’s made with surprsingly wholesome ingredients and no refined sugars.
This idea is based off my Butternut Squash Cake recipe.
I figured that I could use potatoes instead of butternut squash for a similar result and it turns out you can.
You can do anything. There are no rules.
Except potatoes are even better because they yield a lighter colour and texture and are so much cheaper too.
And if I wasn’t excited enough about the fact that the sponge cake turned out so perfectly, my experiments with a vegan white chocolate buttercream were also successful.
After making it, it was hard not to eat the whole bowl, it’s that good.
I also used my trusty vegan lemon curd recipe with some added elderflower cordial for the centre filling.
The combination of these three is just heavenly… If I could do one thing different next time though it would be to add the lemon curd as a whole layer and not just in the centre of the cake.
MORE lemon curd. Always.
📖 Recipe
Vegan Elderflower Cake with Lemon Curd & White Chocolate Frosting
Ingredients
- 300 ml 1 ¼ cups almond milk or preferred dairy-free milk
- Zest and juice of half a lemon
- 600 g 3 ⅓ cups plain white flour
- 1 tbsp baking powder
- 1 tsp bicarbonate of soda
- 150 g ¾ cup mashed potato
- 1 tsp vanilla extract
- 270 ml 1 cup + 2 tbsp agave nectar
- 80 ml ⅓ cup sunflower oil or other mild-flavoured vegetable oil
- Vegan lemon curd with elderflower
- Vegan White Chocolate Frosting
Instructions
- Preheat the oven to 180c. and grease three 8 inch sandwich tins. lemon juice and zest to the almond milk and set aside.
- Sift the flour into a mixing bowl and discard any large granules left in the sieve. Mix in the baking powder and bicarb.
- In a separate bowl, mix together the almond milk from earlier, mashed potato, vanilla, agave and oil. Add the wet ingredients to the dry and mix until well combined and a thick, smooth batter is formed.
- Evenly divide the mixture into the three sandwich tins. The mixture will be quite thick and hard to smooth so I like to wet my hands and smooth the tops with my palms.
- Bake on the middle shelf for 20-25 minutes until a toothpick inserted into the centre of the cake comes out clean. Leave the cake layers to cool at room temperature and then place in the freezer for 10-15 minutes (this makes them easier to handle and decorate.)
To assemble the cake
- Place the first cake layer on your cake stand and spread a generous layer of frosting on top.
- Dollop about four tablespoons of the lemon curd into the centre and gently smooth out.
- Place the next layer on top and repeat.
- For the last layer, simply smooth some icing on top using the back of a spoon.
- Decorate with fresh elderflower or other flowers.
- Serve and enjoy! This cake can be kept refrigerated for up to 3 days.
Mandy says
I use all kinds of mash in my cakes. Sweet potato, betroot bannana dates to name a few
Aimee says
Me too! I especially love using sweet potato and squash. Such a great ingredient for vegan baking :-)
Evi @ greenevi says
Mashed potatoes, wow! Aimee, you are a genius!
This cake looks extremely gorgeous, I so much love elderflower :)
Rosie Vickerton says
So pretty! We once made our Mum a Birthday Cake with mashed potato in it and made her guess what the secret ingredient was- you really can’t tell, can you?
What are the rules with putting flowers on cakes? I know some are poisonous, but what about fertilisers and pesticides on them?
Anna says
Love it all!!! the flowers, the cake, the capture! what a genius idea, mash potatoes!!! :) :) :) I’m so making this cake! xxx
Lucie says
This is amazing Aimee!!! I love all those flavors, I bet even more lemon curd would be heavenly ;) and the added potato is just genius