Upside Down Rhubarb Cake that is gluten-free and made with Almond Flour. Deliciously addictive, perfect for Spring!
It is the giving of attention – that keeps us awake.
In Spring, one of the first things to poke their arms out of the ground are the rosy colored stalks of rhubarb. They surprisingly have many uses in the kitchen- but what they are most known for, is pie.
Rhubarb is also called the “pie plant”- and paired with strawberries, berries, or apples, rhubarb is often thought of as a fruit – but in actuality, rhubarb is a vegetable, in the same family as sorrel. Rhubarb’s flavor and aroma hint of tart apples, berries, and more subtler notes of water and fresh green grass.
In this flour-less upside down cake, I resisted the temptation to add berries or other fruit, in order to highlight rhubarb’s true flavor. The bright liveliness of the rhubarb is front and center, the sourness mellowed slightly with vanilla and butter, while the base of the cake, made entirely of almond meal and no flour, whispers of cardamon. To my palate, the combination delights.
It starts with four cups of fresh rhubarb, cut into ½ inch cubes.
In a heavy bottom skillet, melt butter, and add rhubarb, sugar, lemon juice and vanilla. Stir until combined and sugar has dissolved, but do not cook the rhubarb, it will cook in the oven.
Make the batter.
Separate the yolks from the whites. Mix the yolks with sugar and lemon zest, and combine with dry ingredients. Whip the whites, and then combine all to create a batter.
Pour the almond flour batter over the rhubarb.
Bake in a 375 F oven for 30 minutes, or until a toothpick comes out clean.
It will be fragrant and golden brown. Run and knife along the edges and immediately invert onto a platter.
Let stand 10 minutes before cutting, to let it set.
Sprinkle with powdered sugar and serve with vanilla ice cream.
Related: 20 Recipes to Celebrate Spring!
Upside Down Rhubarb Cake (Gluten-free)
Upside Down Rhubarb Cake that is gluten free- made with Almond Flour. Deliciously addictive, perfect for Spring. Made in a cast-iron skillet.
- Prep Time: 20 mins
- Cook Time: 30 mins
- Total Time: 50 mins
- Yield: 6-8 1x
- Category: Dessert, gluten-free
- Method: baked
- Cuisine: Gluten Free
Scale
Ingredients
- 4 C cups rhubarb, cut into ½ inch cubes ( about 1 ¼ lb)
- 1 1/4 cup sugar -divided ( or use half brown sugar)
- 4 tbsp butter
- 1 T fresh lemon juice
- 2 tsp vanilla extract
- pinch salt
- 4 eggs, separated into 4 egg yolks and 4 egg whites, room temperature
- zest from one lemon
- ¼ teaspoon cardamon
- 1 1/2 cups finely ground almond flour or meal
- 1 teaspoon baking powder
- 1 teaspoon white or cider vinegar
- Powdered sugar for sprinkling
Instructions
- pre heat oven to 375 F
- Over medium heat, melt butter into a well seasoned, 9-10 inch cast iron skillet, and brush the sides with it. Add rhubarb, ¾ C sugar, lemon juice, 2tsp vanilla and pinch salt and stir for 2 minutes, just until combined and sugar has dissolved. Turn heat off. Do not continue to cook rhubarb.
- In a medium bowl, whisk egg yolks with lemon zest, cardamon and ¼ C sugar, until creamy and sugar has dissolved. Set aside. In a small bowl, whisk almond flour, pinch salt, and baking powder until combined.
- Add flour mixture to egg mixture and stir to incorporate. You will have a very thick heavy batter at this point.
- In a stand mixer, whip egg whites on medium high speed, and once you see bubbles, add a pinch of salt and tsp vinegar . Whip until egg whites have formed soft peaks, then add remaining ¼ C sugar a little at a time whipping until medium stiff peaks form. Turn speed to down to medium low and begin spooning in the thick flour – egg yolk batter, a heaping spoonful at a time, into the egg whites, until it is all combined, scraping downs sides as necessary.
- Pour batter over rhubarb in the cast iron skillet and place in a preheated oven, for 30 minutes. While baking, make sure to have ready, what you plan to flip the cake on to. At 30 minutes, check for doneness by inserting a toothpick or skewer into the middle of the cake. If it comes out clean, it is done. If not, bake 5 minutes longer, check again. Pull from the oven, and if making in a skillet, immediately place a cake platter or cake stand over the skillet, and invert, gently tapping the bottom of the skillet so it releases.
- Serve with vanilla ice cream or on its own. The cake is especially good the next day.
Notes
I personally use a cast iron skillet for this recipe! I’ve tried it with a spring form pan- and no leaks- but readers are having issues with leaks. So I recommend a cast iron skillet. 😉
Nutrition
- Calories: 396
Keywords: gluten free rhubarb cake, upside down rhubarb cake, rhubarb recipes, rhubarb cake recipes, gluten free recipes
Made this last night and it got rave reviews! So tasty. After reading some reviews I did drain a bit of the liquid from the fry pan before pouring in the batter. Baked as directed and it came out beautifully. Thank you for this recipe. I’ve been searching for a great dessert with no sugar or wheat flour. This fit the bill.
★★★★★
Awesome Monica!
Delicious!
★★★★★
Well that fills the rhubarb craving!
I a cast iron pan and also had juices that ran onto my serving plate. I used Monk Fruit Erythritol (low carb alternative) in place of the sugar, so it may have responded differently than sugar. Next time (and there will be a next time!), I’ll just add some corn starch to the rhubarb layer.
I also lightened the egg/flour mixture with some of the beaten egg whites so they would incorporate easier…and it seemed to work well. The cake has great texture and favour!
★★★★
I make this cake 2-3 times every spring (yes, for a few years now), sometimes just with rhubarb (like last night) and other times with berries too. And every time, it just sits in the cast iron pan and gets devoured straight from the pan. LOVE LOVE LOVE! Thank you for this gem!
★★★★★
Awwwww thanks Jessica! I’m so glad you like it! I like it too! 😉
Love this cake. Favorite of the season! I add a little almond extract to the dough. Fantastic.
★★★★★
Those are rhubarb STALKS, not stocks.
haha. Yup. 🙂 thanks.
I’m glad to have a new option for rhubarb. I made this exactly as written…it is a bit of a kitchen-destroyer with all the bowls required, but I would say it’s worth it! Served it to our visiting international students who had never seen or tasted rhubarb…everyone loved it!
★★★★★
Awesome! Glad you liked it!
Okay, so why did my rhubarb leak liquid everywhere? I used a spring-form pan, lined and buttered. I followed the recipe to the letter. Result was liquid from teh rhubarb mixture all over …. I am afraid to cut into it. What did I do wrong?
It does smell delicious.
Thanks.
★★★★
How did it turn out?
Beautiful recipe. Trying it with fresh plums right now.
★★★★★
Made this today 5/7/2019. Is there a missing ingredient like cornstarch to thicken the rhubarb sauce? It ran all over my counter and burned the pan under the springform pan???
Oh No Jill! I didn’t use cornstarch but I think I see the problem.First, can you confirm if you used parchment and had the lid inserted with the bumpy side up? Otherwise, directions are not clear. I Will update. If using a spring form pan, let this set 20 minutes before flipping. If using cast iron, flip right away.
I made this last week with rhubarb from the freezer, and it was delicious. However, the egg yolk/flour mixture was really stiff and heavy, causing the whipped egg whites to fall. Trying it again for Easter dinner (we really loved the flavor) and using another egg and less flour. Will let you know how that works. (PS. I baked it in my skillet, which was another lovely touch to the recipe.)
★★★★
I have been looking for ways to use the gallons of rhubarb I have frozen from 2018. I made this tonight. I discovered that my cast iron pans were rusty so I just used an 8”x8” pan. It just fit in the pan and did not run over the side. I also realized half way in that I didn’t have a lemon!! So I used orange juice and some lime and orange zest.
As you may know, baking with frozen rhubarb can be difficult. I drained the rhubarb thoroughly and added more sugar and let it cook at bit longer. It still gave so much juice. But it turned out great. Came right out of the pan. I’m going to share this with my family and friends.
Thank you!!
★★★★★