☕ Coffee Brewing

📚 Cooking

Learn all about ☕ Coffee Brewing in just 15 minutes with the Octo AI app:

  • Understand the fundamentals of coffee extraction and strength
  • Apply grind, ratio, and temperature adjustments to improve brews
  • Recognize taste signs of under- and over-extraction across methods
  • Build foundation for advanced brewing techniques like espresso profiling
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Chapter 1: Coffee Basics & Extraction

What Is Brewing?

Brewing coffee means using water to pull flavors from ground beans.

Key ideas:

  • Water dissolves tasty compounds
  • Time, temperature, and grind control what gets extracted

Too little extraction = sour, thin

Too much extraction = bitter, harsh

Brewing is balancing these forces to hit the sweet spot. ☕

Coffee Basics & Extraction

Extraction Range

Most good brews sit around 18–22% extraction (how much of the coffee mass dissolves).

You don’t need a lab, but understand:

  • Lower extraction → lemony, salty, weak
  • Higher extraction → woody, dry, bitter

Taste your cup and guess: under, ideal, or over? That feedback guides your adjustments.

The Brewing Triangle

Three main levers control taste:

  • Grind size
  • Brew time
  • Water temperature

Change one, and you change extraction.

Rule of thumb:

  • Finer, hotter, longer → more extraction
  • Coarser, cooler, shorter → less extraction

You’ll use this triangle in every method.

Strength vs Extraction

Don’t mix these up:

  • Strength = how concentrated the drink feels (light vs strong)
  • Extraction = how completely flavors are pulled from the grounds

A coffee can be:

  • Strong and under-extracted (intense but sour)
  • Weak and over-extracted (watery yet bitter)

You adjust ratio for strength, triangle for extraction.

Coffee-to-Water Ratio

The ratio sets strength:

  • Common starting point: 1:15–1:17 (1 g coffee to 15–17 g water)

Examples:

  • 15 g coffee → ~250 g water (1:16.7)
  • 20 g coffee → ~320 g water

Higher ratio (1:18) → lighter

Lower ratio (1:14) → heavier, more intense

Always measure with a scale for consistency. ⚖️

💡 This is just Chapter 1. The full content with all chapters, interactive quizzes, and progress tracking is available in the Octo AI app.

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