Quick Answer
The best simple syrup uses a 1:1 ratio by volume: 1 cup of granulated sugar and 1 cup of filtered water gently heated until the sugar dissolves and the liquid runs clear, about 2 to 3 minutes.
For longer shelf life and more concentrated sweetness, use a rich 2:1 ratio (2 parts sugar to 1 part water). Standard 1:1 syrup keeps about a month in the fridge. Rich 2:1 syrup keeps up to 6 months because the higher sugar concentration acts as a natural preservative.
Cool fully, bottle in glass, and use to sweeten cocktails, iced coffee, iced tea, lemonade, or to brush onto cake layers for moisture.
Why simple syrup exists
Granulated sugar does not dissolve well in cold liquids. Pour sugar into iced tea and most of it sits at the bottom of the glass. Heat increases the solubility of water, allowing the sugar crystals to fully dissolve so the sweetness distributes evenly through your drink without grit.
A pre made syrup also doses easily. One tablespoon of 1:1 syrup is roughly equivalent in sweetness to 1 teaspoon of granulated sugar, which makes cocktail recipes precise and consistent.
1:1 vs 2:1: which ratio do you need?
- 1:1 standard syrup: The default for most cocktails (mojito, daiquiri, whiskey sour, gin fizz), iced tea, lemonade, and most coffee drinks. Light, clean, easy to dose.
- 2:1 rich syrup: Better for tiki drinks, Old Fashioneds, espresso based cocktails, and anywhere you want sweetness without diluting the drink with extra water. Lasts much longer in the fridge.
- Demerara or turbinado syrup: Same ratios, but with raw sugar for a rich molasses note. Standard for rum cocktails and bourbon drinks.
Ingredients
| Ingredient | 1:1 Standard | 2:1 Rich |
|---|---|---|
| Granulated white sugar | 1 cup (200 g) | 2 cups (400 g) |
| Filtered water | 1 cup (240 ml) | 1 cup (240 ml) |
| Yield | about 1.5 cups | about 1.75 cups |
Method
1. Combine
Pour the sugar and filtered water into a small saucepan and place over medium heat.
2. Dissolve
Stir constantly with a heatproof spatula until the liquid turns completely clear and you cannot see or feel any sugar granules at the bottom. This takes about 2 to 3 minutes. Do not let the mixture boil hard. A quick simmer is fine. A rolling boil evaporates water and shifts the ratio.
3. Cool
Remove from the heat the moment the sugar dissolves. Let the syrup cool fully to room temperature in the saucepan, about 30 minutes.
4. Bottle and store
Pour the cooled syrup into a clean glass bottle or jar. Refrigerate immediately. Use within the timeline listed below.
Shelf life
| Syrup type | Refrigerated | At room temperature |
|---|---|---|
| 1:1 simple syrup | About 1 month | 1 to 2 weeks |
| 2:1 rich syrup | Up to 6 months | 1 month |
| Demerara 2:1 | Up to 6 months | 1 month |
Signs of spoilage: cloudiness, fuzzy growth, off smell, or any colour change. When in doubt, discard.
Flavoured variations
- Mint syrup: Steep 1 cup of fresh mint leaves in the hot syrup for 30 minutes, then strain.
- Vanilla syrup: Split a vanilla bean and add it during cooking. Strain or leave in the bottle.
- Ginger syrup: Simmer 2 inches of sliced fresh ginger with the sugar and water for 10 minutes.
- Cinnamon syrup: Add 2 cinnamon sticks during cooking and leave in the bottle for ongoing flavour.
- Citrus zest: Add the zest of 1 lemon, lime, or orange to the hot syrup, steep 20 minutes, and strain.
- Lavender, rosemary, or thyme: Steep 2 tablespoons of fresh herb in the hot syrup for 30 minutes.
Uses beyond cocktails
- Cake soaks: Brush onto sponge cake layers to lock in moisture before frosting.
- Iced coffee: Sweeten cold brew without grit.
- Lemonade: Mix with fresh lemon juice and water for a perfectly balanced summer drink.
- Fruit preserving: Pour over sliced strawberries or peaches to macerate.
- Sorbet base: Sweeten fresh fruit puree before churning.
Common mistakes
- Boiling too hard. Evaporates water and pushes the syrup denser than intended.
- Hot bottling. Pouring hot syrup into glass risks cracking and traps steam, which can spoil the syrup faster.
- Tap water with off flavours. If your tap water tastes like chlorine, use filtered water.
- Plastic bottles. Some plastics leach into hot or warm sugar solutions. Stick with glass.
Frequently asked questions
Do I have to heat it?
For 1:1 syrup, you can shake sugar and water together in a sealed jar until the sugar dissolves (about 2 minutes of hard shaking). It works fine for immediate use but spoils faster than the heated version because no heat reduced the bacterial load.
Why is my syrup crystallising?
Too high a sugar concentration without enough heat to fully dissolve. Re heat gently, stir until clear, and cool again. Adding a pinch of corn syrup or a teaspoon of lemon juice helps prevent recrystallisation in 2:1 syrups.
Can I use brown sugar?
Yes, but it changes the colour and flavour. Brown sugar syrup pairs beautifully with rum, bourbon, and aged tequila drinks.
Cocktail dosing reference
Most classic cocktail recipes that call for "1 teaspoon sugar" or "1 sugar cube" translate to about 1/4 oz of 1:1 simple syrup. A standard "1/2 oz simple syrup" call sweetens a single shaken cocktail like a daiquiri or whiskey sour. For tiki drinks calling for "rich syrup," use 2:1 demerara syrup at the same volume.
Coffee shops typically pump 1/2 oz of vanilla or hazelnut syrup per medium drink. Iced tea and lemonade work well with about 1 oz of simple syrup per 16 oz glass for moderate sweetness.
Equipment and clean up
You need almost nothing: a small stainless or non reactive saucepan, a heatproof spatula, and a clean glass bottle for storage. Avoid aluminium pans, which can react with the long simmer of 2:1 syrups and impart a metallic taste. Swing top glass bottles (Bormioli style) are perfect for storage and pour cleanly into a measuring jigger.
The takeaway
Simple syrup is the most useful 5 minute kitchen project you will ever do. Match the ratio to the job: 1:1 for everyday cocktails and coffee, 2:1 for shelf life and tiki drinks. Heat gently, cool fully, bottle in glass, and you have a tool that powers dozens of drinks and desserts for weeks at a time.
