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Gluten-free lemon cake with raspberries | you’ll never guess the secret ingredient

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gluten free lemon cake from mashed potatoes | kitchen heals soul

I left the Chemistry department of McGill University in 2010, and at that time, the department was about to go through a major, much-needed renovation. So, just before I graduated, I helped move the lab, which to be honest felt like “my lab.” My lab had to move to a temporary space so that the renovations could begin. I think moving the lab was the hardest thing because it meant my lab, including my fumehood and my desk were going to be demolished. I spent 6 long years in that space, and they were 6 years of an emotional roller coaster that culminated in a PhD in Chemistry. And though I was happy that the lab was finally getting the overhaul it needed, I couldn’t imagine anybody destroying such a monumental part of my life and my history. I spent my last days at McGill taking apart my little corner of the building, stripping it bare.

 

gluten free lemon cake | kitchen heals soul

Since I worked 7 days a week most of the time, I spent many, many Sunday mornings hidden in my little corner fumehood at McGill. Those peaceful Sunday mornings, when nobody was around, were my favourite. I would work silently and efficiently, completely undisturbed by anybody. I broke many rules on those Sundays, first and foremost because I was often doing chemistry alone (rule #1 always work in pairs in case of accidents). Usually, I was drinking a latte in the lab on those mornings (despite my firm “no drinking in the lab” rules that applied Monday to Friday when the younger students were around). I would sit at my fumehood on my tall, black Ikea stool, usually purifying something I made the day before, wearing my favourite goggles that had saved my eyes probably a million times over the years. Those goggles were etched from solvent splashes and reagents, proof of why you should always wear goggles in the lab.  My Sunday mornings were spent mostly in solitude, just doing my thing, that thing I did best. That tiny corner of the building was mine. I knew its quirks and I was comfortable there. Those goggles were my security blanket. In those last days, as I emptied out the lab, removing every last trace of me and my old life, my goggles went missing and I never found them, much to my dismay. Oh, the irony of it all.

gluten free lemon cake with lemon curd | kitchen heals soul

I find it very difficult to go back to that building at McGill and visit the lab that was home. In fact, I haven’t even taken the tour to see how the space turned out, though I’ve been to the building for countless PhD defenses since. I don’t think I want to visit my old lab made new. My fumehood is gone and so is my little corner. My goggles vanished long ago, and then this week, I think I attended my last Chemistry PhD defense. It all seems so very final now, four years later. And what better way to look back and mark the end of an era than with a cake? It seems fitting as my last years at McGill were also spent unwinding in the kitchen, baking cakes and cookies for my labmates whenever I could find a spare moment. Instead of quiet Sunday mornings in the lab, today I spend quiet Sunday mornings baking, and making cakes like this. I suppose that closing the previous chapter of my life isn’t all bad.

gluten free lemon cake with raspberries | kitchen heals soul

I think my favourite cake combination is cake + lemon curd + berries. It’s not a hard to make the components, and I’ve learned over the years that it’s best kept simple: a single cake layer topped with a thick layer of lemon curd and a scattering of berries. And you can serve this with more lemon curd on the side for those who can’t get enough of it, which is basically everyone.

gluten free lemon cake with lemon curd and berries | kitchen heals soul

I urge you to make your own lemon curd because the stuff in the jars just isn’t right. In fact, the jarred commercial lemon curds are downright awful if you ask me. They taste artificial, they often contain all sorts of fillers, and sometimes, they are even fluorescent yellow. And I don’t know about you, but I have no intention of eating anything that is fluorescent yellow, even if it’s called lemon curd, because that’s just wrong.

This cake is impressive because of it’s height. I baked it in a tall 8-inch springform pan (from Kaiser, but you can also put it in a regular 9-inch cake pan and it will work just as well, if not better. The baking is a little easier in a 9-inch cake pan, like this one from Chicago Metallic (taking about 45–50 minutes, instead of over an hour).

gluten free lemon cake with berries | kitchen heals soul

 

I am not leading a gluten-free lifestyle, but I do find it interesting to try and bake gluten-free. If nothing else, it’s a challenge, and also I think it’s really exciting baking with different flour and starch sources than what a traditional kitchen would use. I’ve baked with chestnut flour to make gluten-free cranberry chestnut financiers, rice flour to make gluten-free pistachio financiers, and a combination of gluten-free whole grain flours to make this gluten-free raspberry cake. This gluten-free cake has the look of a good cake, the crumb of a good cake, and an impressive mouthfeel. It contains a lot of ground almonds so there is an almond flavour in it that is the perfect setting for a generous layer of lemon curd, and it’s made with mashed potatoes (from yellow boiling potatoes). And there’s no xanthan gum, which is a bonus for me. For now, I’m sharing with you this recipe, but if you click here, you can find the process of how I got to this final recipe for a gluten-free mashed potato cake.

Congratulations D!

Gluten-free lemon cake recipe

 

Gluten-Free lemon raspberry cake
3 from 1 vote
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Gluten-free lemon cake with raspberries

This gluten-free cake has the look of a good cake, the crumb of a good cake, and an impressive mouthfeel. It contains a lot of ground almonds so there is an almond flavour in it that is the perfect setting for a generous layer of lemon curd, and it’s made with mashed potatoes (from yellow boiling potatoes). Also, there’s no xanthan gum, which means it has a better taste and texture.

Course Dessert
Cuisine American
Prep Time 25 minutes
Cook Time 1 hour 15 minutes
Total Time 1 hour 40 minutes
Servings 12 slices
Calories 427 kcal
Author Janice

Ingredients

Lemon curd ingredients

  • 100 g granulated sugar 1/2 cup
  • 84 mL lemon juice freshly squeezed
  • 4 egg yolks
  • 72 g unsalted butter ~1/3 cup, cut into pieces

Gluten-free lemon cake ingredients

  • 150 grams unsalted butter 1/2 cup + 2 tbsp
  • 200 grams granulated sugar 1 cup
  • Zest of 3 lemons
  • 4 large eggs
  • 1 tsp vanilla extract
  • 175 g ground almond 1 1/2 cups
  • 75 g sorghum flour
  • 250 g mashed potato 1 cup, packed, from about 400 g yellow potatoes that were peeled, boiled, passed through a ricer and then cooled to room temperature
  • 2 tsp baking powder

Garnish

  • 2 pints fresh raspberries

Instructions

For the lemon curd

  1. Have a bowl ready with a strainer over top to strain the curd right away at the end of this recipe.
  2. Combine half the sugar with the lemon juice in a saucepan. Begin to heat it on medium–high heat.
  3. Meanwhile, beat the yolks with the rest of the sugar til they have lightened in colour.
  4. When the lemon juice is steamy and just about boiling, dump it onto the light yolk mixture, and whisk to combine to temper the eggs.
  5. Pour the lemon egg mixture into the saucepan and continue heating, whisking constantly, until it comes to a boil. Boil for 1 minute, whisking non-stop.
  6. Turn the heat off, and add the butter a piece at a time while still whisking.
  7. When all the butter is added, strain the mixture into the prepared bowl. Cover with cling film so that it touches the entire surface of the curd.
  8. Refrigerate overnight.

To make the cake

  1. Preheat the oven to 350ºF. Butter and flour (I used millet flour) an 8-inch springform pan, then line the bottom with a round of parchment. Set aside.
  2. In the bowl of an electric mixer fitted with the paddle attachment, cream the butter and the sugar with the lemon zest until it is light and fluffy,
  3. Add the eggs, one at a time, scraping down the sides of the bowl as needed and beating well between each addition.
  4. Add the vanilla and the ground almonds and beat the mixture again, scraping down as needed.
  5. Add the sorghum flour, beat again, then finish the cake batter by adding the mashed potatoes and baking powder. Continue mixing in the stand mixer until the batter is well mixed.
  6. Pour the cake batter into the prepared pan and bake for about 65 minutes until the cake feels firm and a cake tester inserted into the middle comes out clean.
  7. Let cool 10 minutes before unmolding onto a wire rack to cool completely.

To assemble the cake

  1. Peel off the parchment lining from the cake and set it on a cake stand.
  2. Top with a generous amount of lemon curd (half at least, if not all!) smoothing it over top, and then garnish with fresh raspberries.

Recipe Notes

For this recipe, I used Stirling Creamery unsalted butter

Single layer gluten-free lemon cake topped with homemade lemon curd and fresh raspberries served on a tarnished antique cake stand

I do my best to bake with the finest ingredients. Stirling Creamery, a Canadian company, has provided the butter for this post.

Gluten-Free lemon raspberry cake

almonds, berries, citrus, curd, gluten-free, gluten-free cake, gluten-free cake recipe, lemon, lemon curd, mashed potatoes, new, nuts, raspberries, recipe

9 Responses to Gluten-free lemon cake with raspberries | you’ll never guess the secret ingredient

  1. Marlene June 18, 2014 at 12:52 pm #

    I love the simplicity of this cake — no complicated fillings or artful swirls of buttercream, just a good honest cake, decadent lemon curd and those berries. Beautiful!

  2. Liliana June 19, 2014 at 1:15 pm #

    Whenever I make a sponge cake, I always serve it with home-made lemon curd and berries – my family’s favourite dessert.

    Your cake looks lovely. I would never have thought that mashed potatoes was the secret ingredient. I am looking forward to making it and sieving it to my family. Thanks for sharing.

  3. astrid June 26, 2014 at 10:11 am #

    In using the mashed potato, do you let it fully cool down or do you use it fresh and warm? In Irish potato pancakes, it makes a big difference as chilling the potato retrogrades the starch preventing gumminess. Also, you are correct that using different potatoes will give drastically different results due to their very different starches. The use of a waxy potato in potato pancakes make for a horribly dense and gummy outcome. It can be difficult just looking at a picture to know if you used a waxy (I suspect not) a floury (like russet and others) or something in the middle. Can you be more precise in the type of potato you used. Also, what does the sorghum flour do for the recipe? It is not something I usually have on hand. Why did you think baking in the 9″ cake pan is easier or better than the 8″ springform other than the shorter time?

    • Janice June 30, 2014 at 8:58 am #

      Hi Astrid, here’s a link to a post where I describe the steps behind developing this recipe: https://www.kitchenhealssoul.com/2014/06/23/developing-a-gluten-free-cake-the-process/html

      Thanks for your comments. I don’t think I was clear enough about how I used the mashed potatoes. I boiled a bunch of peeled potatoes until they were very soft, then I passed them through a ricer to “mash” them. I let the mashed potatoes cool completely (adding no butter, nor any milk), and then when they were cooled, I weighed out what I needed and added it to the cake batter.

      The potatoes I used had a yellow flesh and were round. They weren’t called Yukon Golds, but I suspect they are a very similar type, which is a less floury, more moist.

      I used the sorghum flour to help reduce the amount of moisture in the cake batter. I made several attempts before trying sorghum (which is a good, general gluten-free flour that many gluten-free bakers like to use). I suspect even millet would work (or perhaps even rice flour or potato flour), but the texture and mouthfeel would be different. The sorghum was affordable (especially compared to the xanthan!).

      As for the pan size, with this quantity of batter, the springform pan was more than 3/4 full, so it took longer to bake, and I personally find it more difficult to get a fully, well cooked center when the cake pan is so full.

      Hope this helps and if you need anything more, let me know!

  4. Curious June 29, 2014 at 10:52 pm #

    Your recipe sounds very interesting. I often try GF recipes when entertaining a Gluten Intolerant family member and find it stressful not just for the responsibility but also financially, as GF flours and xantham gum are so expensive (especially since you can only buy a package when I might only need a tablespoon, every few months!) I’m curious about the mashed potatoes. Forgive my ignorance, I should probably know the answer anyway, but is it simply potatoes that have been mashed, or “mashed potatoes” (ie: with milk)?

    • Janice June 30, 2014 at 8:47 am #

      Hi! Thanks for stopping by! You are right. As somebody else pointed it out, it wasn’t clear what “type” of mashed potatoes I used.
      Basically, I boiled the peeled potatoes til they were nice and soft, and then I passed them through a ricer. I let the “mashed” potatoes cool completely before weighing out what I needed and adding them to the cake batter. So, the mashed potatoes were plain: no milk and no butter.

      Hope that helps 🙂

Trackbacks/Pingbacks

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    […] For the final recipe for this gluten-free mashed potato cake, click here. […]

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