Simple syrups are easy to make, but one tough question lingers: How long does simple syrup last? Don’t miss these storage hacks.
Would you like to save this?
We'll email a link to you, so you can come back to it later! Plus you'll get great new recipes each week!
DISCLAIMER
*This post may contain affiliate links, meaning Feast + West may receive commissions for purchases made through those links — at no cost to you. All opinions are our own. Please read our full disclosure for more information.
Your guide to storing simple syrup
Whether you use them for cakes, coffee or cocktails, simple syrup is a must-have ingredient. Made with a base of sugar and water, they’re inexpensive to make at home and easy to modify with different kinds of sugar and flavorings.
So how long does simple syrup last? The answer is a little murky. No, really — if your creation has a cloudy appearance, toss it. Ditto for any funny odors. Bacteria and mold can occur, too.
Proper storage methods are essential to avoid these unsavory contaminants. When stored properly in clean containers in the fridge, homemade syrups can last between two weeks and six months, depending on their recipes.
Note from the author
2026 update: This article originally appeared on Food Drink Life in 2024. I have just updated it with new photos of moldy, crystallized and spoiled syrups from my fridge (yes, for real!) to help you troubleshoot issues with your own creations. I added additional storage tips and tricks for making the most of your syrups.
Proper storage techniques
If you store your syrup well from the beginning, you will give it the best chance to last as long as possible.
- Always store homemade simple syrups and coffee syrups in the fridge. Even though sugar is a preservative, water and flavoring agents like spices or fresh fruit can either spoil or bring contaminants into the mix, causing it to go bad faster than plain simple syrup.
- Clean your containers. Clean glass containers like jars and bottles are the best storage for simple syrups. Wash them with hot soapy water and rinse them out completely, then dry before adding your syrup to help it last the longest.
- Check the label. Store-bought syrups may contain some preservatives or ingredients like corn syrup to make them shelf-stable, so they may be able to be stored at room temperature. With commercial brands, it is best to follow the date and guidance on the packaging label.
favorite syrup storage
These syrup bottles and jars make fridge storage easy and gifting even easier.
Buy Now → 
Buy Now → 
Buy Now → *
Best storage containers
An airtight container with a lid is a must to keep syrups as fresh as possible. These are the best storage containers:
- Mason jars
- Bottles
- Syrup dispensers
- Glass containers
- Plastic containers
I prefer to use a glass container, but whatever you use, remember a tight seal is important. Pour spouts and corks are porous, which can let air into the container. This could potentially spoil your syrup sooner.
Shelf-life of simple syrup
When stored in the refrigerator in a food-safe, airtight container, here’s how long simple syrup can last:
- 1:1 ratio of sugar to water (no infusions or add-ins): about one month
- 2:1 ratio of sugar to water (no infusions or add-ins): up to three to six months
- any ratio with infusions or add-ins: one to two weeks.
Sugar and water on their own are susceptible to bacteria and spoilage. When you add infusions into the mix, these additional ingredients are more susceptible to going bad, they can more easily contaminate the liquid sweetener.
Common flavors include fresh fruit or juice, vegetables, flowers, herbs and spices — think strawberry, lavender, jalapeño, mint and cinnamon. Combinations of any of these can contribute to a shorter shelf life as well.
» Check out some more of our favorite simple syrup variations.
Troubleshooting & signs of spoilage
Syrups aren’t immortal and they do go bad. If you forgot to label your simple syrup, you might not remember how long it’s been in your fridge. (Believe me, I’ve been there. Many times, in fact!) Luckily, I took advantage of a recent fridge clean out to snap some pictures of actual syrups in my fridge to show you some of the common problems.
Bad odors
Simple syrups do go bad because they are prone to bacteria. They can take on an odorous smell or foul flavor, which are dead giveaways of spoilage.
Start with a smell test and give the syrup a strong sniff. If it smells bad, do not consume it and throw it away instead. If it smells all right, but are still unsure, taste a drop of the syrup. If the flavor is “off” in any way (yes, even if it smells okay), it’s best to throw it out and make a new batch.
What to do: If it has a foul, sour, bitter or fermented odor or flavor, toss the simple syrup. Better safe than sorry!
Mold
If you notice anything growing on the top, bottom, or sides of the jar, this could be mold. There are many different kinds of mold, and it can be black, green, white or even take on the color of the syrup (e.g. whitish pink on a red syrup). While not all mold is harmful, many produce dangerous toxins and indicate spoilage.
What to do: Better safe than sorry, my mom would say. Throw it out!
Cloudiness or discoloration
If you discover that your simple syrup has an uneven color or cloudy appearance, this is a sign of contamination and it’s time to toss it. However, cloudiness can be hard to detect on opaque or dark-colored syrups, so it shouldn’t be your only measurement.
What to do: When in doubt, throw it out!
Crystallization
Simple syrups can crystallize in time, especially if there is a high sugar content. If you’ve ever eaten or made rock candy, it is made by concentrating sugar in water and forcing it to grow on a string or stick. Crystallization of simple syrup occurs with the exact same process, and sugar crystals can grow on the bottom or walls of the jar or even the top of the liquid.
What to do: If your syrup does crystallize, simply warm up the syrup over low heat. Stir in a little extra water, which will help to dissolve the sugar crystals.
Jelly-like texture
Sometimes fruit syrup can take on a gelatin-like texture. This is often due to a natural thickening agent called pectin that occurs in some fruits. Quite often, these fruits are used to make jams and jellies because of their natural gelling quality.
High-pectin foods include tart apples, quinces, citrus fruits and their peels, cranberries, currants and gooseberries. When these fruits are used to make syrups, they can cause the syrup to become jelly-like as well.
What to do: No need to throw it away, as this is a natural occurrence that doesn’t indicate spoilage. If your simple syrup gets thick and jelly-like, simply warm up the syrup over low heat to return it to a liquid texture.
Freezing simple syrup
Freezing simple syrups can extend their shelf life. You can put the whole jar or bottle in the freezer, provided it is a freezer-safe container. One of the best hacks is to pour it into an ice cube tray to make single-serving cubes that are perfect for a quick cocktail. When you’re ready to use it, thaw it in the fridge, at room temperature or defrost in the microwave.
Tips for making simple syrup last longer
But if you prefer to keep sweeteners at the ready, there are a few things you can do. Sugar content, acids and alcohol, as well as your storage container, can all play a part.
- Add preservatives like vodka, lemon juice or even vinegar to the syrup, about a quarter ounce per cup of syrup. However, doing this can change the flavor, brix and viscosity.
- Make rich simple syrup. Many recipes use a 1:1 ratio of equal parts sugar to water, but a rich syrup contains a 1.5:1 or 2:1 ratio. With more sugar in the mix, it will not only be thicker and sweeter, but the extra sugar acts as a preservative as well.
- Use new jars or sterilize reused containers before adding your creations. Follow tips for canning for the safest way to clean a jar.
- Be sure the lid is screwed on tightly. A proper seal prevents air from getting in.
- Write the date you made it on a piece of tape stuck to the jar. This will help you keep track of its expiration date as you monitor it for signs it is going bad.
While it’s never nice to toss a delicious creation, thankfully, these sweeteners are inexpensive to make. You can easily cook up a new batch or use a simple syrup substitute. Next time you make simple syrup, take care to extend the shelf life from the very beginning. You’ll be glad you did because you can enjoy your creations as long as possible.
FAQ
Homemade syrups will last the longest when stored in a refrigerator in an airtight container. Refrigeration may help store-bought syrups last longer too, but always check the label for manufacturer instructions for storage.
Yes! Freezing is a great way to extend the shelf life of simple syrup. Pour it into a freezer-safe jar or bottle, or use an ice cube tray to make single-serving portions that are easy to grab for a quick cocktail. When you’re ready to use it, thaw it in the fridge, at room temperature or in the microwave.
There are no tested, research-backed guidelines for canning plain simple syrup on its own. The National Center for Home Food Preservation — the USDA-backed authority on home canning — covers sugar syrups only as a packing liquid for canning fruit, not as a standalone preserved product. For simple syrup you plan to use in cocktails or coffee drinks, refrigerating or freezing is your safest bet.
Give it a sniff first — if it smells sour, fermented or just “off,” toss it. Also look for cloudiness, discoloration or anything growing on the sides or bottom of the jar. When in doubt, throw it out and make a fresh batch. Simple syrup is inexpensive and quick to make, so it’s never worth the risk.
Don’t toss it — crystallized simple syrup is still salvageable. Warm it up over low heat on the stovetop and stir in a little extra water to help dissolve the sugar crystals. It should return to its normal consistency within a few minutes.
A few tricks help: Use a 2:1 ratio of sugar to water instead of 1:1, since the extra sugar acts as a preservative. Store it in a clean, airtight glass container in the fridge. You can also add a small amount of vodka or lemon juice — about a quarter ounce per cup — to extend the shelf life, though this may slightly affect the flavor.
Leave a Reply