Sugar Syrup Ratios: Simple, Rich, and When to Use Each

Three ratios, three different drinks. Simple syrup (1:1) is the default. Rich syrup (2:1) is the upgrade. Demerara adds character. Here is how to make all three and when to use which.

Three small glass bottles of sugar syrup at different viscosities and colours.
Three ratios every home bar should have on hand.

Sugar syrup is the cocktail ingredient everyone overlooks and no-one gets quite right. The ratio you use changes how sweet the drink tastes, how thick it feels in the mouth, and how well it mixes with citrus. Here are the three ratios worth knowing, when to use each, and how to make them.

We already have a basic sugar syrup recipe. This is the ratios guide that builds on it.

The three ratios

1:1 Simple Syrup, the default

1 part sugar, 1 part water, by volume. 1 cup sugar + 1 cup water = about 1.5 cups syrup. Thin, pourable, dissolves instantly into cold drinks.

Works in: most shaken citrus cocktails, Margaritas, Daiquiris, Whiskey Sours, Mojitos.

A clear glass bottle of pale thin 1:1 simple sugar syrup on a dark bar counter.
Simple 1:1. Thin, pale, fast-dissolving. The default.

2:1 Rich Syrup, the upgrade

2 parts sugar, 1 part water, by volume. Twice as sweet per ounce, so you use half as much. Less water enters the drink, keeping cocktails from getting watery when they need to stay spirit-forward. Silkier mouthfeel too.

Works in: Old Fashioneds, Manhattans (when sweetened), spirit-heavy cocktails. Also a direct upgrade in any recipe where you would otherwise add simple syrup.

A clear glass bottle of deeper golden 2:1 rich sugar syrup, more viscous than simple.
Rich 2:1. Thicker, more golden, sweeter per pour.

Demerara Syrup, the character pick

Made with raw cane demerara or turbinado sugar instead of refined white sugar. Amber-coloured, lightly caramel-flavoured, with molasses notes. Adds warmth and a gentle rummy/whiskey character.

Works in: Old Fashioneds, Mai Tais, Dark ‘n’ Stormy, Hot Toddies, anything rum- or aged-whiskey-based.

A clear glass bottle of deep amber demerara sugar syrup, noticeably darker than white-sugar syrups.
Demerara. Amber, caramel-noted, built for rum and aged whiskey.

How to make all three in 30 seconds

Simple syrup (1:1), cold method

  1. Add 1 cup caster sugar to a sealable jar.
  2. Add 1 cup water (cold or room temp).
  3. Shake for 30 seconds, or until the sugar dissolves.
  4. Done. Keeps in the fridge for 2 weeks.

Rich syrup (2:1), warm method

  1. Combine 2 cups sugar and 1 cup water in a small saucepan.
  2. Heat over medium, stirring constantly, until the sugar dissolves. Do not boil.
  3. Remove from heat, cool completely, bottle.
  4. Keeps 3 to 4 weeks in the fridge.
A bottle of sugar syrup beside an empty coupe glass with a bar spoon and sugar crystals on the bar.
Sugar syrup mise en place: bottle, coupe glass, bar spoon, a little raw sugar.

Demerara syrup

Same method as either simple or rich, swap demerara or turbinado sugar for white sugar. Demerara doesn’t dissolve as easily, so even at 1:1 you’ll want gentle heat.

Storage and shelf life

  • Simple syrup (1:1): 2 weeks in the fridge.
  • Rich syrup (2:1): 3-4 weeks in the fridge.
  • Demerara syrup: same as its white-sugar counterpart.

Always store in the fridge. Throw out if you see cloudiness, mould, or fizziness. A teaspoon of vodka per cup extends shelf life.

When to substitute what

  • “1 oz simple syrup”: use 0.5 oz rich syrup instead. Same sweetness, less dilution.
  • “Sugar cube” (Old Fashioned): 0.25 oz rich syrup or 0.5 oz simple syrup.
  • Agave nectar: 1.5x sweeter than simple syrup, so use two-thirds the amount.
  • Honey: make honey syrup (2 parts honey, 1 part warm water) first, then sub 1:1 for simple syrup.

Flavoured syrups, briefly

  • Ginger syrup: 1 cup rich syrup + 2 tbsp grated ginger, steep 30 min, strain.
  • Rosemary syrup: 1 cup simple syrup + 2 sprigs rosemary while warm, steep 15 min, strain.
  • Cinnamon syrup: 1 cup rich syrup + 1 broken cinnamon stick, steep 1 hour, strain.
  • Vanilla syrup: 1 cup simple syrup + 1 split vanilla pod, steep 2 hours, strain.
  • Lavender syrup: 1 cup simple syrup + 1 tsp dried culinary lavender, steep 10 min only, strain.

The one thing most people get wrong

Not refrigerating. Sugar syrup kept at room temperature ferments in 4 to 7 days. Fridge it always.