“Thank you for this lovely, simple recipe! Made the rhubarb cake according to instructions and knew right away that I should have made two. ~Nancy
an easy rhubarb cake for breakfast and beyond
The texture of this cake is just perfect, it’s not too sweet, and the tart rhubarb gives it a unique flavor. There’s a nice background note of vanilla in the batter which plays really well with the rhubarb. And then there’s that slightly crunchy sugary crust ~ this rhubarb cake is divine whether you have it for breakfast, snack on it all day, or save it for dessert.
ingredients for rhubarb cake
You’ll just need a few stalks of rhubarb for this breakfast cake recipe, enough to make 2 cups of thin slices. The red color is beautiful, but green rhubarb will give you wonderful flavor too.
- rhubarb
- fresh is best but you can use frozen sliced rhubarb if you have it. If you do use frozen rhubarb, don’t thaw it first or it can become soggy.
- butter
- I always bake with unsalted butter. If you only have salted on hand, just leave out the extra salt in the recipe.
- granulated sugar
- I sprinkle a little extra over the cake before baking which creates a light crunch to the crust.
- egg
- half & half, cream, or buttermilk
- use them interchangeably according to what you have in the fridge.
- all purpose flour
- baking powder
- salt
- lemon juice
- vanilla
- the vanilla and tart rhubarb make a wonderful flavor combo, but I also love it with almond extract, so use your favorite.
Rhubarb FAQs
Is rhubarb a fruit or a vegetable?
- Rhubarb is a tart vegetable (it’s part of the buckwheat family!) that we treat as a fruit in cooking. It grows in long leafy stalks, and kind of looks like red celery. The stalks can be harvested when very young, or when large and mature. Do not eat rhubarb leaves, they are poisonous. They contain oxalic acid, which is toxic to humans.
When is rhubarb season?
- Rhubarb season is April through June, but you’ll see if sooner and later in some areas. Rhubarb is one of the first veggies of spring.
Is rhubarb healthy?
According to Healthline…“Rhubarb is a good source of fiber and antioxidants. Studies show that rhubarb fiber may lower cholesterol.”
Rhubarb is low in calories and high in fiber, making it a great choice for those watching their weight or looking to improve their digestive health. It is also a good source of vitamin K, which is important for bone health.
Why is my rhubarb green?
- Rhubarb varies in color from deep crimson to pale green. Newer varieties, like my Cherry Red rhubarb, is bred for its sweet flavor and intense color, which is nice because that’s one of the things we love about rhubarb and it’s a big drag when the color doesn’t bloom in recipes. There is little difference in flavor between the green and red, but red rhubarb can be stunning when cooked.
How to cook rhubarb?
- Rhubarb can be cooked in a variety of ways, including stewing, baking, and poaching. It is often used in pies, crisps, and crumbles, as well as in sauces and jams. To cook rhubarb, simply cut off the leaves and the tough bottom end of the stalks, then chop them into small pieces and cook them with sugar until they are soft and tender. For cakes and muffins you use raw rhubarb, just slice the stalks to the size needed for your recipe.
Can you freeze rhubarb?
- Rhubarb freezes beautifully. Slice it and lay it out on a parchment paper lined baking sheet. Put the pan in the freezer and freeze until solid. Then transfer the rhubarb to a freezer style zip lock baggie or airtight container.
Do I need to thaw rhubarb before using?
- In most cases there’s no need to thaw the rhubarb when you want to use it for cooking, or baking, just use it frozen.
more rhubarb, please!
Rhubarb is such an unusual ingredient, and strictly seasonal, so I recommend grabbing it while you can.
- Perfect Rhubarb Muffins ~ these fabulous muffins have a light streusel topping.
- Rhubarb Bread ~ a tender quick bread loaded with rhubarb.
- Rhubarb Vanilla Bean Jelly ~ this easy jelly is a stunning color and makes a great gift for friends and neighbors!
- Old Fashioned Rhubarb Crunch ~ one of my faves!
- Ginger Rhubarb Crisp ~ the unique flavor and color of rhubarb is showcased in this easy dessert.
- Norwegian Rhubarb and Almond Cake ~ a lovely tea cake from Scandinavia.
“This recipe is perfection. We had it last night for dessert with ice-cream. This morning we had it with butter for breakfast. It was so fast and easy to put together. You have given me another keeper. Thank you for sharing it with us.” ~Leslie
Rhubarb Cake
Equipment
- 9×9 square baking pan
Ingredients
- 1/2 cup half and half, cream, or buttermilk
- 1 tsp lemon juice
- 1/2 cup unsalted butter at room temperature
- 1 cup granulated sugar plus 2 tsp for sprinkling
- 1 large egg, at room temperature
- 1 1/2 tsp vanilla extract
- 2 cups all purpose flour, saving out 1 Tbsp to toss with rhubarb
- 2 tsp baking powder
- 1 tsp salt
- 2 cups thinly sliced rhubarb
Instructions
- Preheat the oven to 350F Lightly butter a 9×9 square baking pan. I like to line the pan with parchment paper with overhanging ends so I can easily lift out the cooled cake for cutting. That's optional.
- Stir the lemon juice into the half and half and set aside.
- Cream the soft butter and sugar in a stand mixer, or with electric beaters, until fluffy and pale yellow. Beat in the egg and vanilla, scraping down the bowl as necessary.
- Take 1 Tbsp of the flour to the rhubarb and toss well.
- In a separate bowl whisk together the remaining flour, baking powder, and salt.
- Add half of the flour mixture to the bowl and blend in. Add all of the half and half, and blend in. Finally add the rest of the flour and blend just until combined, don't over mix. Fold in the rhubarb. Note: the batter is on the thick side.
- Spread the batter into the prepared pan and sprinkle the top evenly with a little sugar. Bake for about 40-45 minutes, or until the cake is turning golden and a toothpick in the center comes out without wet batter clinging to it (moist crumbs are fine.)
- Let the cake cool slightly before cutting.
Video
Notes
- Other fruit like berries work beautifully in this rhubarb breakfast cake.ย Also try chopped banana.
- Mix the topping sugar with a touch of cinnamon for a hint of spice.
- For a lower fat option try buttermilk in place of the half and half and lemon.ย Half Greek yogurt and half milk would work, too.
Hi Sue, I’ve been trying to print this recipe but instead of text only, but when I click on print, a photo of the breakfast cake takes up almost one entire page leaving me having to print two pages to get a copy of recipe. Wondering if there would be any way you could change the option to text only on your recipe as I don’t want to waste so much coloured ink.
Thank you
Hey Joyceyn, I just removed the photo to make it easier to print, I’ll look into how I can make them smaller going forward!
Just out of the oven and cooling. Had to cut off a corner to taste. This cake will be a keeper. Light, fluffy and oh so tasty! Found this recipe but didn’t have rhubarb, then remembered seeing some growing in my neighbors garden. Called her up and she said…come and pick some, so I did!
What fun, there’s nothing like picking your own rhubarb, I did that last week!
Thank you Sue, printed ( text only ) perfectly. Much appreciated!
I’ll try to figure out a better way, I never know if people would prefer an image for reference, or not. I’ll work on getting an on/off button for the images, at least.
It looks amazing and I couldnโt wait to try it! However, I baked it about 20 minutes longer than it calls for and it was still gooey on the inside. The outside edges taste FABULOUS and I will be trying it again. Must have been operator error! ?
It sounds like maybe your oven temp is running low, do you have an oven thermometer to check it? Even a small difference in temperature can really throw the timing off.
I knew I had to make this cake as soon as I saw the recipe. I love rhubarb. I was not disappointed! It’s soft and moist and the rhubarb is fragrant. I added some ground ginger to the sugar topping and it was wonderful. Bravo!
Thanks Katie ~ the ginger sounds pretty nice. Now you need to freeze some rhubarb so you can make this all year long ๐
How long will this cake keep and still taste good?
I covered it with foil and it was still moist and tasty 3 days later.
Oops. Covered with foil AND refrigerated.
I made this last night and it’s amazing! I love that the rhubarb flavour comes through so well. I also love that it’s not sickly sweet. This recipe is definitely a keeper.
Thanks Joanna, you put it well, the flavor does come out nicely, I’m not sure we really get to taste rhubarb on its own in many recipes, so I like that, too.
Recipe directions donโt mention went to put the half & half and lemon mixture into the batter. I presume this is done before adding the flour mix. Is this correct?
It’s there in step 6 Mimi, I add it alternately with the flour, just to keep the batter nice and light.
Looks so good! Do you think this could be made without dairy? I was thinking of subbing almond creamer for the half & half and coconut oil for the butter. Has anyone tried something like this?
The creamer should be no problem, and I think the coconut oil should work, especially if you use it in the solid form.
I made this today, subbing coconut oil for the butter and almond milk for the half and half to make it dairy free. Turned out amazing!
Yay ! that’s really good to know, thanks Miranda ๐
Can you use frozen rhubarb?
Sure, Ellen. Assuming your frozen rhubarb is already cut, I’d use it straight from frozen.
You had me at breakfast cake! ๐ This is the perfect cake for weekend baking!