What happens if you brew coffee with instead of water?

Brewing coffee with milk instead of water will result in a milky coffee beverage, which is sometimes called a "coffee milk" or "latte."

Here's what happens when you brew coffee with milk instead of water:

1. Milk Proteins and Fats: Milk contains proteins, such as casein, and fats, which affect the extraction and flavor of the coffee. These components interact with the coffee grounds and can lead to a creamier and smoother texture compared to coffee brewed with water.

2. Extraction Differences: The presence of milk proteins and fats can alter the extraction process. Milk proteins can bind to some of the coffee compounds, potentially reducing the extraction of certain flavors and caffeine. This can result in a milder and less intense coffee taste.

3. Flavor Profile: The addition of milk can significantly change the flavor profile of coffee. The milk's natural sweetness and creaminess can mask some of the coffee's bitterness and acidity. This can result in a more balanced and mellow flavor, preferred by those who enjoy milder coffee beverages.

4. Texture and Consistency: Milk naturally adds body and texture to the coffee. The fats and proteins in milk contribute to a fuller mouthfeel and a velvety consistency, making the coffee smoother and more enjoyable for many people.

5. Emulsification: The milk's proteins and fats can help stabilize and emulsify the coffee's oils and compounds. This can lead to a more stable foam or microfoam when the beverage is frothed or steamed, which is essential in popular milk-based espresso drinks like lattes and cappuccinos.

Overall, brewing coffee with milk instead of water results in a different coffee experience. The resulting beverage is creamier, smoother, and milder, with a unique flavor profile that appeals to those who prefer dairy-based coffee drinks.