Making Coffee Syrup at Home
Coffee syrup is a concentrated infusion made by simmering equal parts water and sugar with high-quality coffee grounds until the mixture thickens into a pourable, pourable liquid. The secret is patience: straining it through a fine-mesh sieve or a damp cheesecloth ensures the finished syrup remains clear and free of grit, leaving you with a potent extract that blends smoothly into cold milk or over ice cream.
Balance is everything
Use a coarse grind similar to what you would use for a French press to keep the syrup from turning murky. A heavy-bottomed saucepan prevents the sugar from scorching while the coffee infuses.
- Heavy-bottomed saucepan
- Fine-mesh sieve
- Cheesecloth
- Glass storage jar
What goes in.
- 1 cupwater
- 1 cupgranulated white sugar
- 1/2 cupcoarsely ground coffee
- 1/4 tspvanilla extract (optional)
Avoid the Boil
Once the sugar dissolves, reduce the heat to the lowest possible setting. You want the coffee to steep in the hot syrup, not boil, which would turn the flavor bitter and sharp.
The method.
Combine the water and sugar
Place the water and sugar in the saucepan over medium heat. Stir continuously until the liquid is entirely clear and no crystals remain on the bottom.
Add the coffee
Remove the pan from the heat briefly to stir in the coarse grounds. Return it to the lowest heat setting.
Steep the grounds
Allow the mixture to hover just below a simmer for 15 minutes. The edges of the liquid will wiggle, but you should not see rolling bubbles.
Strain the syrup
Place a cheesecloth-lined sieve over a clean bowl. Pour the mixture through slowly. Do not press on the grounds; let gravity do the work to keep the syrup clean.
Cool and store
Stir in the vanilla if using. Let the syrup reach room temperature before sealing it in a jar. Keep it in the refrigerator.
Other turns to take.
Spiced Coffee Syrup
Add one cinnamon stick or a star anise to the water while the sugar dissolves for a warmer, aromatic finish.
Dark Roast intensity
Swap the white sugar for dark brown sugar to introduce a slight molasses note that stands up better to very dark, Italian-style roasts.
When it doesn't go to plan.
If the syrup looks cloudy, run it through a fresh piece of damp cheesecloth a second time.
Shake the jar before each use to ensure the flavors have settled evenly.
This syrup lasts up to three weeks in the refrigerator, but it is best within the first ten days.
The ones that keep coming up.
Why shouldn't I press the grounds through the sieve?
Pressing the grounds releases fine sediment and bitter oils that will make the syrup muddy and astringent rather than clean and bright.
Can I use instant coffee?
No. Instant coffee will dissolve entirely into the syrup, creating a texture closer to a sludge than a smooth liquid.
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