Dalgona Coffee: A Detailed Guide to Ingredients, Process, and Variations

Dalgona Coffee is a whipped coffee beverage made by vigorously mixing instant coffee, sugar, and hot water into a frothy foam, then layering it over cold or hot milk. Originating from South Korea, the drink gained international popularity in early 2020 due to its viral presence on social media platforms. Despite its seemingly elaborate presentation, Dalgona Coffee follows a simple recipe with minimal ingredients and equipment.

This article explores the formulation of Dalgona Coffee, including its origin, preparation method, required ingredients, science behind the foam, variations, and storage considerations.

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1. Origin and Name

The term "Dalgona" comes from a Korean street candy made with sugar and baking soda, which has a light, crunchy texture and caramelized taste. While the coffee drink does not contain dalgona candy, the whipped texture and color resemble the candy’s appearance, hence the name.

Although similar whipped coffee techniques have existed in countries such as India (where it is known as “phenti hui coffee”) and Greece (“frappé”), the method became globally recognized as "Dalgona Coffee" due to widespread adoption during the COVID-19 lockdown period.

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2. Core Ingredients

Dalgona Coffee is made using the following core ingredients in equal ratios:

• Instant Coffee
  Soluble coffee granules or powder are required. Freshly ground or brewed coffee does not yield the same foam due to the lack of stabilizing agents found in instant coffee.

• Granulated Sugar
  White sugar is most commonly used. The sugar not only sweetens the drink but plays a critical role in stabilizing the foam.

• Hot Water
  Hot (not boiling) water is used to dissolve the sugar and coffee, facilitating the whipping process.

• Milk
  Typically served over cold or warm milk, either dairy or plant-based.

Optional additions may include vanilla extract, cocoa powder, or cinnamon for flavor, and ice for serving.

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3. Standard Recipe

The standard formula follows a 1:1:1 ratio of instant coffee, sugar, and hot water. Below is the basic preparation method.

Ingredients (Serves 1–2):

• 2 tablespoons instant coffee

• 2 tablespoons granulated sugar

• 2 tablespoons hot water (approximately 90–95°C)

• 1 cup (240 ml) milk (cold or hot)

• Ice cubes (optional for iced version)

Instructions:

1. Combine Ingredients
   In a medium-sized mixing bowl, combine instant coffee, sugar, and hot water in equal parts.

2. Whip the Mixture
   Using a hand whisk, electric mixer, or milk frother, vigorously whip the mixture for approximately 3–5 minutes until it turns into a thick, glossy, and light brown foam with soft to medium peaks.

3. Prepare the Milk Base
   Fill a glass with cold or hot milk. Ice cubes may be added for a chilled drink.

4. Assemble the Drink
   Spoon the whipped coffee foam on top of the milk. Serve without stirring for layered presentation or mix before drinking.

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4. Scientific Explanation of the Foam

The creation of Dalgona Coffee foam is a result of incorporating air into a mixture that contains surfactants (surface-active agents), such as proteins and carbohydrates found in instant coffee and sugar. The process of whipping disperses air throughout the liquid, while sugar stabilizes the foam by increasing viscosity and preventing air bubbles from collapsing quickly.

Unlike espresso-based foams (which rely on milk proteins), Dalgona Coffee foam is purely air-based and can maintain its structure for a moderate period if left undisturbed.

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5. Variations and Modifications

Dalgona Coffee is flexible and can be modified in various ways to suit dietary needs or flavor preferences:

a. Sugar-Free Version

Sugar substitutes such as erythritol, stevia blends, or monk fruit extract may be used, although the stability and texture of the foam may vary. Granulated forms work better than liquid alternatives.

b. Decaffeinated Version

Decaffeinated instant coffee can be used for those sensitive to caffeine.

c. Vegan or Dairy-Free Version

Plant-based milks such as almond milk, oat milk, soy milk, or coconut milk are suitable alternatives to dairy milk.

d. Flavored Dalgona

Cocoa powder, vanilla extract, cinnamon, or nutmeg can be added to the whipped mixture or sprinkled on top for additional flavor.

e. Mocha Dalgona

A small amount of cocoa powder is added to the whipped coffee for a chocolate-infused variation.

f. Matcha or Tea-Based Versions

While true Dalgona foam requires coffee and sugar, whipped matcha lattes have gained attention as a non-caffeinated alternative. These typically use heavy cream or egg whites as a base for whipping, combined with matcha powder and sugar.

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6. Tools and Equipment

Although traditional whisks can be used, electric mixers significantly reduce preparation time and effort. A stand mixer, electric hand mixer, or handheld frother can produce consistent results in 1–2 minutes.

Use of chilled mixing bowls and clean, dry utensils is recommended for optimal foam formation. Nonstick bowls or those with traces of oil can hinder whipping.

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7. Nutritional Information (Approximate)

A single serving of standard Dalgona Coffee contains approximately:

• Calories: 180–220 kcal

• Sugar: 15–20 grams

• Caffeine: 60–80 mg (depending on the brand of instant coffee)

• Fat: Depends on the type of milk used

The drink is considered high in sugar and should be consumed in moderation, particularly by individuals with diabetes or those on low-calorie diets.

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8. Storage and Stability

Dalgona foam is best consumed fresh. However, the whipped coffee mixture can be stored in the refrigerator for up to 2 days in an airtight container. Before serving, it may need to be re-whipped to regain volume.

Freezing the whipped foam is not recommended as it can alter the texture and structure.

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9. Cultural and Social Impact

Though Dalgona Coffee existed prior to its viral moment, the global interest in the drink during 2020 popularized it across multiple continents. It was widely embraced for its visual appeal, minimal ingredient requirement, and home-friendliness during lockdown periods.

Since then, cafes have incorporated variations into their menus, and the whipped coffee concept has influenced other beverage trends.

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Conclusion

Dalgona Coffee is a simple yet visually captivating beverage made using instant coffee, sugar, and hot water whipped into a foam and served over milk. Its popularity stems from the unique preparation method, minimal ingredient list, and aesthetically layered presentation. Though high in sugar and caffeine, the drink can be modified to meet different health needs and taste preferences. As both a culinary and cultural phenomenon, Dalgona Coffee continues to be a relevant and accessible drink for global audiences.