This vibrant rhubarb simple syrup is great for mixing into cocktails and mocktails! It's sweet and tart, with lovely rhubarb and vanilla bean flavor. All real ingredients used, easy to make in 30 minutes. I love to stir rhubarb syrup into sparkling water and lemonade, and for making margaritas, mimosas, and gin & tonics.
That’s where this rhubarb simple syrup comes in, for all your beverage needs, both alcoholic and non-alcoholic. Infused with vanilla bean and cardamom as it simmers, this simple syrup is sweet and slightly tart with delicate rhubarb flavor. And the gorgeous red color is magical in its own right, similar to my cranberry simple syrup, which is perfect for the winter months.
This recipe is easy to make in 30 minutes – all you need is a sauce pot and fine mesh strainer.
Delicious ways to use homemade rhubarb syrup:
Mix with seltzer water or club soda for a refreshing mid-day drink.
Cut rhubarb into 1/2 inch chunks. Add to a sauce pot with water, sugar, salt, vanilla bean, and cardamom.
Simmer on medium low for 15-20 minutes, stirring occasionally, until rhubarb is completely broken down and juices have released.
Remove from heat and let cool for 10-15 minutes, then strain syrup into bowl, pressing down lightly onto rhubarb mixture to get juices out.
Stir lemon juice into rhubarb syrup, and pour into a beverage bottle for storage. I like to use glass bottles that have a swing top, or I reuse glass liquor bottles.
Rhubarb after simmering. This is what it should look like before straining.
Can You Freeze Rhubarb Syrup?
Yes! Rhubarb syrup can be easily frozen to preserve it for 6-8 months. Simply pour the finished syrup into a glass storage bottle or jar, leaving about 2 inches from the top to leave room for expansion when it freezes and thaws. To use, simply remove bottle from freezer and let thaw on the counter.
What to look for when buying or picking rhubarb:
Rhubarb differs slightly in color depending on the variety, the stalks ranging from green, pink, and red. Red stemmed types are not necessarily sweeter, because color and sweetness are not always related. But they do make for prettier desserts and give this rhubarb syrup the prettiest ruby red hue, so if you’re going for looks, try to find a red or pink variety.
Rhubarb is most tender and flavorful in spring and early summer but can be used throughout the season. Select firm, crisp stalks when they are 8 to 15 inches long. To harvest, twist off the leaf stalk at the soil line rather than taking a knife and cutting near the roots. Finally, cut off the leaf.
This vibrant rhubarb simple syrup is great for mixing into cocktails and mocktails! It's sweet and tart, with lovely rhubarb and vanilla bean flavor. All real ingredients, easy to make in 30 minutes. Stir into sparkling water and lemonade, and or use for making margaritas, mimosas, and gin & tonics.
Add rhubarb, water sugar, salt, vanilla bean, and cardamom to a sauce pot.
Simmer on medium low for 15-20 minutes stirring occasionally, until rhubarb is completely broken down and juices have released.
Remove from heat and let cool for 10-15 minutes then strain syrup into bowl, pressing down lightly onto rhubarb mixture to get juices out. (Save the jammy mixture that is left for yogurt and ice cream – it’s delicious too!
Stir lemon juice into rhubarb syrup then pour into a clean beverage bottle for storage. I like to use glass bottles that have a swing top, or I reuse glass liquor bottles.
Syrup will last in refrigerator for 3-4 weeks, or in freezer for several months.
I look forward to your comments, reviews and questions! If you love this recipe, please rate it when you leave a comment. Star ratings help people discover my recipes. Your support means a lot; thank you for being a part of the Heartbeet Kitchen community.
further to my previous post – I personally wasn’t a fan of the vanilla with the other flavors – so will omit it this time (I love the cardamom and lemon – may increase these a bit).
I have doubled this recipe and canned it (water bath method in pint jars) – with great results. Makes great gifts! My rhubarb has survived the summer really well this year (with regular watering) and I’m making another batch today for winter gifting.
Hi there, it’s time to start my rhubarb harvest, as I was looking for inspiration I came across your recipe. Is it possible to sub honey or maple syrup in for the sugar? Thanks!
As a general rule, the shelf (refrigerator) life of simple syrup can be extended, up to three months or longer, by:
1. Making a richer syrup — increasing the ratio of sugar to water to 1:1 or higher, while remembering to adjust the recipe to reflect the higher sugar content, e.g., instead of one ounce of 0.5:1 syrup, one-half ounce of 1:1 syrup.
2. Adding vodka or other spirit to create a 1:8 alcohol: syrup ratio.
3. Sanitizing the container, which requires time and effort and runs the risk of not doing it properly.
Hello! You won’t get a lot of the flavor out of the extract, but you can certainly add about a 1/2 teaspoon after you remove it from the heat. The vanilla bean has a distinct floral, rich note that the extract doesn’t have.
This really is wonderful syrup! The spices in it are just perfect. I have made 10 quarts so far. I use it to flavor sparkling water from my soda stream, and I am going to be very sad when the rhubarb runs out! I have used the left over pulp in vanilla frozen yogurt and ice cream. How refreshing!
Lisa
September 6, 2024
further to my previous post – I personally wasn’t a fan of the vanilla with the other flavors – so will omit it this time (I love the cardamom and lemon – may increase these a bit).
Lisa
September 6, 2024
I have doubled this recipe and canned it (water bath method in pint jars) – with great results. Makes great gifts! My rhubarb has survived the summer really well this year (with regular watering) and I’m making another batch today for winter gifting.
Amanda Paa
September 6, 2024
love to hear that! i also enjoy giving it as gifts; something unique!
Sierra
June 14, 2024
Recipe is delicious and so easy. Fun way to use some rhubarb! Made margaritas and lemonade with the syrup and it was amazing!
Amanda Paa
June 15, 2024
Yes, rhubarb margaritas are my favorite thing to make with it! And the lemonade is so refreshing on a hot day.
Teri
June 14, 2024
Sooo Good !! Add to my vodka with club soda or just club soda. Have added the rhubarb to oatmeal and yogurt . On batch #3
Britt
May 26, 2024
Hi there, it’s time to start my rhubarb harvest, as I was looking for inspiration I came across your recipe. Is it possible to sub honey or maple syrup in for the sugar? Thanks!
Amanda Paa
May 27, 2024
Hello! Honey or maple syrup will overpower the rhubarb flavor so I do not recommend.
Juses
May 26, 2024
Can this recipe be canned ?
Kelly Tweten
June 15, 2024
I’d like to know too. It would be great to enjoy all year long.
Amanda Paa
June 15, 2024
I have not tested canning this, but it can be frozen to preserve longer.
Kathryn Moldstad
May 16, 2024
Delicious! I prefer a bit less sugar for a more tart flavor…but it’s sooo good! Many rhubarb margaritas coming my way this summer!
Brian J Hostetler
May 9, 2024
As a general rule, the shelf (refrigerator) life of simple syrup can be extended, up to three months or longer, by:
1. Making a richer syrup — increasing the ratio of sugar to water to 1:1 or higher, while remembering to adjust the recipe to reflect the higher sugar content, e.g., instead of one ounce of 0.5:1 syrup, one-half ounce of 1:1 syrup.
2. Adding vodka or other spirit to create a 1:8 alcohol: syrup ratio.
3. Sanitizing the container, which requires time and effort and runs the risk of not doing it properly.
Dee
January 3, 2024
Can I use frozen rhubarb if I don’t have fresh? If so, would I use use less water?
Amanda Paa
January 3, 2024
Hi Dee! Frozen rhubarb will work great for this simple syrup. I would make use an ounce or two less water, but it shouldn’t affect the recipe much.
Alison
September 13, 2023
I dont have vanilla bean, can I just use vanilla extract?
Amanda Paa
September 13, 2023
Hello! You won’t get a lot of the flavor out of the extract, but you can certainly add about a 1/2 teaspoon after you remove it from the heat. The vanilla bean has a distinct floral, rich note that the extract doesn’t have.
Kimberly Brown
July 9, 2023
This really is wonderful syrup! The spices in it are just perfect. I have made 10 quarts so far. I use it to flavor sparkling water from my soda stream, and I am going to be very sad when the rhubarb runs out! I have used the left over pulp in vanilla frozen yogurt and ice cream. How refreshing!
Amanda Paa
July 9, 2023
I’m sad that my rhubarb is winding down, too!! I’m so glad you like the rhubarb syrup, 10 quarts is incredible!
Nancy Street
September 12, 2022
Simple and delicious. I adore the spice flavors. By the way, I’ve used the “discard jam” as an addition to muffins. It adds a nice flavor.
Amanda Paa
September 12, 2022
Great to hear, Nancy!
Anna
July 7, 2022
Super easy and delicious! I used it in a margarita and it was amazing. Thank you!
Amanda Paa
July 7, 2022
yay, that’s what i love using it to make as well!
Carla
June 22, 2022
Absolutely delicious! Comes together so well and the fact that it can be used in ways for the whole family to enjoy is a great bonus.
Amanda Paa
June 22, 2022
yay, glad to hear it! and your photo of the syrup on instagram was beautiful!
Amy
June 12, 2022
Tastes like summer! Super easy and versatile recipe. Good way to savor rhubarb for the rhubarb lover
Amanda Paa
June 13, 2022
glad to hear you liked it, Amy!