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Cold Brew With Lemon and Dalgona at Home: Simple Summer Coffee Experiments

Posted on August 13, 2025August 13, 2025 by Jim

Valencia hit 40°C this week, so I traded hot coffee for two easy summer options: a light cold brew with a squeeze of lemon, and a 2‑minute Dalgona (whipped coffee) over ice.

Cold Brew With Lemon (French Press Method)

French press cold brew concentrate after 18-hour steep
18-hour French press cold brew, diluted 1:1
  • 60–70 g medium‑coarse ground coffee per 1 L cold filtered water
  • Steep 16–18 hours in a French press at room temp
  • Press, refrigerate; dilute 1:1 if it’s too dark
  • Serve over ice with a small squeeze of lemon
  • Note: Lemon brightens and lightens without added sugar

Dalgona (Whipped Coffee) in 2 Minutes

Dalgona whipped coffee over iced milk
Dalgona foam over iced milk

Equal parts instant coffee and brown sugar (e.g., 2 tsp each)

  • 1–2 tbsp hot water; whip with a milk frother 30–60 seconds until foamy
  • Pour over cold milk and ice; adjust sweetness to taste
  • Taste: Refreshing and sweet, but far lighter than a Frappuccino

Quick demo if you’re visual:

Tips and Tweaks

Refreshing and sweet, but not Frappuccino levels of sugary dangerous.

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