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A pink blackberry cocktail in a martini glass next to a stainless steel cocktail shaker on a white cloth
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Homemade Blackberry Simple Syrup

A gorgeous, deep purple syrup made with fresh blackberries that transforms cocktails, lemonade, and desserts into something truly special. Ready in fifteen minutes.
Course Drinks
Prep Time 5 minutes
Cook Time 15 minutes
Total Time 20 minutes
Servings 300 ml
Calories 55kcal
Cost 2

Equipment

  • Small saucepan
  • Wooden spoon or muddler
  • Fine mesh sieve
  • Clean glass jar or bottle
  • Funnel

Ingredients

Syrup Ingredients:

  • 200 g caster sugar
  • 240 ml water
  • 200 g fresh or frozen blackberries
  • Pinch of salt
  • squeeze of fresh lemon juice optional

Blackberry Coconut Rum Cocktail - per serving:

  • 30 ml blackberry simple syrup
  • 60 ml coconut rum
  • 30 ml fresh orange juice
  • Ice
  • Fresh blackberries to garnish

Instructions

Syrup Instructions:

  • Combine sugar and water in a small saucepan over medium heat. Stir until sugar is completely dissolved.
  • Add blackberries and a pinch of salt. Gently crush the berries with a wooden spoon.
  • Bring to a gentle simmer and cook for 10–15 minutes, stirring occasionally, until the syrup is deep purple and fragrant.
  • Remove from heat. Strain through a fine mesh sieve into a clean jar, pressing gently on the berries.
  • Cool completely, seal, and refrigerate for up to one month.

Cocktail Instructions:

  • Fill a cocktail shaker with ice.
  • Add blackberry syrup, coconut rum, and orange juice.
  • Shake well for 10 seconds.
  • Strain into a chilled martini glass or tumbler with ice.
  • Garnish with fresh blackberries.

Notes

Frozen blackberries work well; no need to thaw first. Add a splash of vodka to the finished syrup to extend shelf life. Strain through muslin for a perfectly clear syrup. The syrup freezes well in ice cube trays for up to three months.