The Coffee Blueprint | The Coffee Brewing Control Chart

July 2, 2026

☕📊 The Coffee Blueprint | The Coffee Brewing Control Chart

The Coffee Brewing Control Chart is one of the most important tools ever developed for understanding coffee extraction and brew quality. 📚 Developed to help brewers, roasters, baristas, and coffee enthusiasts achieve consistent results, the chart provides a scientific framework for balancing strength and extraction to produce an ideal cup of coffee.

Simply put, the Brewing Control Chart answers one of coffee's oldest questions:

☕ Why does this cup taste amazing while another tastes sour, weak, bitter, or harsh?

📖 What Is the Coffee Brewing Control Chart?

The Coffee Brewing Control Chart is a graphical representation showing the relationship between:

💧 Beverage Strength (Total Dissolved Solids or TDS)
🫘 Extraction Yield (how much coffee material was dissolved)

By plotting these two variables, brewers can determine whether a coffee is:

😖 Under-extracted
😌 Properly extracted
😬 Over-extracted

The chart transforms coffee brewing from guesswork into repeatable science. 🔬

🧪 The Two Variables That Matter

1️⃣ Beverage Strength (TDS)

TDS, or Total Dissolved Solids, measures how much coffee material is dissolved into the brewed beverage.

💧 Low TDS = Weak coffee
☕ High TDS = Strong coffee

Typical filter coffee falls between:

📉 1.15% TDS
📈 1.45% TDS

2️⃣ Extraction Yield

Extraction Yield measures how much of the coffee grounds were dissolved during brewing.

Coffee beans contain:

🍯 Sugars
🍋 Acids
🍫 Chocolate compounds
🌰 Nut oils
🌿 Plant fibers
🪵 Woody compounds

The goal is to dissolve enough desirable compounds while avoiding excessive extraction of bitter compounds.

Ideal extraction generally falls between:

✅ 18%
✅ 22%

📈 Understanding the Brewing Zones

🔵 Under-Extracted Zone

When extraction falls below approximately 18%, coffee often tastes:

🍋 Sour
🌱 Grassy
🥜 Peanut-like
💨 Thin-bodied
💧 Watery

Common causes include:

⚙️ Grind too coarse
⏱️ Brew time too short
🌡️ Water temperature too low
📏 Too little agitation

🟢 Ideal Extraction Zone

This is the famous "Golden Cup" region. 🏆

Coffee brewed in this range typically exhibits:

🍯 Sweetness
🍫 Balance
🍊 Pleasant acidity
🥜 Defined origin character
☕ Full body

This zone generally occurs around:

☕ 18-22% Extraction Yield
💧 1.15-1.45% TDS

🔴 Over-Extracted Zone

When extraction exceeds roughly 22%, undesirable compounds begin entering the cup.

Symptoms include:

🪵 Woody flavors
🌑 Bitterness
🌿 Astringency
😖 Dry finish
🔥 Harshness

Common causes include:

⚙️ Grind too fine
⏱️ Brew time too long
♨️ Excessively hot water
🔄 Excessive agitation

⚖️ Strength and Extraction Are Different

One of the biggest misconceptions in coffee is believing that strength and extraction are the same thing.

They are not. ❌

☕ Strong coffee can be under-extracted.
☕ Weak coffee can be over-extracted.

Examples:

💥 Espresso often has very high strength but can still be under-extracted.
🚰 Large batch coffee may be weak while simultaneously being over-extracted.

Understanding this distinction changes how brewers troubleshoot problems.

🛠️ How Brewers Use the Chart

Professional brewers use the chart to diagnose brewing problems quickly.

Problem	Likely Cause	Adjustment
🍋 Sour coffee	Under-extraction	Grind finer or brew longer
🌑 Bitter coffee	Over-extraction	Grind coarser or brew shorter
💧 Weak coffee	Low strength	Increase coffee dose
💥 Too intense	High strength	Reduce coffee dose