Brown Sugar Syrup for Coffee: Easy Recipe Plus Cinnamon Version

Austin Barker Updated September 29, 2026 ยท 6 min read

Brown sugar syrup is brown sugar dissolved in an equal amount of water and warmed until clear. It takes about 8 minutes, keeps in the fridge for two weeks, and one batch makes 12 to 15 servings.

The molasses in brown sugar gives it a toasty, caramel sweetness that white sugar syrup lacks, which is why it is the base of the brown sugar oat milk shaken espresso and a good match for iced coffee, lattes and cold foam. If the drink is new to you, we explain what a shaken espresso is separately. This guide covers the basic recipe, light versus dark sugar, the cinnamon version and how to fix a syrup that crystallizes.

Brown sugar syrup recipe

Use equal parts brown sugar and water by volume. That gives a syrup that is sweet without being cloying and pours easily from a squeeze bottle.

  • 1 cup (200g) light or dark brown sugar, packed
  • 1 cup (240 ml) water
  • 1 pinch of fine salt (optional)
  • 1/2 teaspoon vanilla extract (optional)
Light brown sugar in a glass bowl on a kitchen scale, ready to make brown sugar syrup
Weigh the sugar if you can, so every batch tastes the same. Photo by Arwen.
  1. Combine the sugar and water in a small saucepan and stir once.
  2. Heat over medium, stirring occasionally, until the sugar has completely dissolved. Do not boil.
  3. Take it off the heat and stir in the salt and vanilla.
  4. Cool, pour into a clean jar or squeeze bottle and keep it in the fridge for up to two weeks.

The syrup is thin while warm and thickens slightly once cold. Both are normal. Start with 2 tablespoons per serving and adjust from there.

Scaling the recipe: small, standard and large batches

The one-to-one ratio scales cleanly, so you can make as much or as little as you will use in two weeks. Keep the brown sugar and water equal and the timing barely changes.

BatchBrown sugarWaterMakesServings at 2 tablespoons
Small1/2 cup (100g)1/2 cup (120 ml)About 3/4 cup6
Standard1 cup (200g)1 cup (240 ml)About 1 1/2 cups12
Large2 cups (400g)2 cups (480 ml)About 3 cups24

If you only have a coffee or two a day, the small batch is plenty. A large batch is worth it only if you are making iced drinks for a household, because the two-week fridge limit is real.

Light or dark brown sugar?

SugarMolasses (roughly)FlavorBest for
Light brownAbout 3.5 percentMild caramelIced coffee and lattes where the coffee should lead
Dark brownAbout 6.5 percentDeeper toffee and molassesHot drinks, oat milk and spiced drinks

Both dissolve the same way and both give a tea-colored syrup. If you only own one, use it. Dark brown sugar simply tastes louder.

Starbucks lists brown sugar, invert sugar, water, natural flavor and salt in its brown sugar syrup, so the pinch of salt is not an afterthought. It sharpens the caramel note and stops the sweetness tasting flat.

Brown sugar cinnamon syrup and other variations

For cinnamon syrup, add 3 or 4 cinnamon sticks to the pan at the start, or 1 teaspoon of ground cinnamon for a stronger version. Steep it off the heat for 5 to 10 minutes, then strain. A longer steep gives a stronger cinnamon flavor. The cinnamon version is also a natural sweetener for chai, so try it in an iced chai latte, or stir 3 tablespoons into a batch of homemade coffee creamer.

  • Vanilla: stir in 1 teaspoon of extract after the heat is off.
  • Ginger: simmer 3 thin slices of fresh ginger with the sugar, then strain.
  • Cardamom: crush 3 pods and steep them like the cinnamon.
  • Orange: add 2 strips of peel while the syrup steeps, and remove them before storing.

How much brown sugar syrup to use

DrinkSyrup
Iced coffee (12 oz)1 to 2 tablespoons
Iced latte (16 oz)2 tablespoons
Shaken espresso (2 shots plus oat milk)2 tablespoons
Hot coffee (8 oz)1 tablespoon
Cold foam (one drink)1 tablespoon

For a layered iced drink, stir the syrup into the cold milk before you add the espresso, as in our iced latte method. For brown sugar cold foam, froth 1/4 cup of milk with 2 tablespoons of heavy cream and 1 tablespoon of syrup, using the technique in our cold foam guide. The same foam tops our banana bread latte. For plain iced coffee, the syrup slots into any of the methods in our iced coffee guide.

Ways to use brown sugar syrup

Coffee is the obvious home for it, but the syrup earns its jar space elsewhere too. Anything you would sweeten with brown sugar and want to dissolve instantly is a candidate.

  • Iced tea and milk tea: 1 to 2 tablespoons gives black tea a caramel edge.
  • Oatmeal and yogurt: it pours where granules would clump.
  • Pancakes and French toast: warm it slightly and use it like maple syrup.
  • Cold foam and whipped cream: a tablespoon sweetens and flavors in one step.

Brown sugar syrup vs simple syrup and other sweeteners

Granulated sugar dissolves slowly in cold drinks, which is the whole reason to use a syrup. Stir it into iced coffee and much of it sinks to the bottom. A syrup blends in instantly.

SweetenerFlavorDissolves in cold drinks?
Brown sugar syrupCaramel and molassesYes
Simple syrup (white sugar)NeutralYes
Granulated sugar stirred inNeutralPoorly
Maple syrupWoodsy and distinctYes

Brown sugar syrup nutrition

Expect roughly 30 to 35 calories and about 8 g of sugar per tablespoon. A batch of 1 cup of brown sugar and 1 cup of water makes about 1 1/2 cups, or 24 tablespoons, and all the sugar ends up in the jar, so the sums are simple.

At 2 tablespoons a drink that is around 65 calories and 16 g of sugar from the syrup alone, and it adds up quickly if you pour freehand, so measure. Our pumpkin spice syrup carries a similar sugar load per tablespoon.

Troubleshooting: crystals, cloudiness and flavor

  • Boiling: a hard boil drives off water and pushes the syrup past what it can hold. Keep the heat at medium and stop when the sugar is dissolved.
  • Stirring after it dissolves: this seeds crystals. Stir until clear, then leave it alone.
  • Sugar on the pan sides: stray grains fall back in and start crystals. Wipe the sides with a wet spoon.
  • The fix: warm the syrup gently with a splash of water and stir until the crystals disappear.

Cloudiness is usually just fine sugar particles and is harmless. A sour smell, fizzing or a film on top means it has spoiled, so throw it out.

  • Too sweet: use 1 tablespoon per drink instead of 2, and add a pinch of salt to the syrup next time.
  • Too bland: switch to dark brown sugar or add a 1/2 teaspoon of vanilla after cooking.
  • Too thin in the fridge: simmer for 2 more minutes, or use 1 1/2 parts sugar to 1 part water.
  • Too thick to pour: stir in a teaspoon of hot water at a time.

The bottom line

Brown sugar syrup is two ingredients and eight minutes, and it turns plain iced coffee into something that tastes bought. Make a batch on Sunday and it carries you through the week. More recipes live in our coffee drinks section.

Frequently Asked Questions About Brown Sugar Syrup

What is the ratio for brown sugar syrup?

One to one by volume, which is 1 cup of packed brown sugar to 1 cup of water. For a thicker, richer syrup use two parts sugar to one part water, and use about half as much per drink.

How long does brown sugar syrup last?

Up to two weeks in a sealed jar in the fridge. Throw it out if it smells fermented, looks fizzy or grows a film on top.

Can I use light or dark brown sugar?

Either works. Light brown sugar gives a milder caramel flavor and dark gives a deeper toffee and molasses flavor. Use whichever you have.

Why did my brown sugar syrup crystallize?

Usually because it boiled too hard, was stirred after the sugar dissolved, or had sugar grains stuck on the sides of the pan. Warm it gently with a splash of water to dissolve the crystals.

Is homemade brown sugar syrup the same as the Starbucks version?

It is very close. Starbucks lists brown sugar, invert sugar, water, natural flavor and salt, so a pinch of salt helps you match the taste. Invert sugar keeps a syrup smooth, so yours may thicken or crystallize a little more.

Can I use brown sugar syrup in hot coffee and tea?

Yes. It dissolves instantly in hot drinks too. Use about 1 tablespoon per 8 ounces and adjust to taste.

Austin Barker Founder & Lead Editor Seven years behind a bar before starting Brewing Coffees. Writes most of the equipment coverage and tests every machine on this site in an ordinary home kitchen.