About this Video

• Video Title: Wie bereite ich den richtigen Espresso zu? - Die Funktionsweise der Kaffeemühle erklärt!
• Channel: Davide Costanza Espresso
• Speakers: Davide, Andri
• Duration: 00:26:18

Introduction

This video explains how to prepare a perfect espresso, focusing on the functionality of a coffee grinder. The speakers address common problems with grinder settings and aim to provide viewers with the knowledge to make a great espresso.

Key Takeaways

• Grinder Types: The video discusses two main grinder types: the traditional disc system and the conical burr system, explaining their differences and common uses.
• Fresh Beans: Using freshly roasted beans is crucial for optimal espresso flavor. Storing beans properly (e.g., in the freezer) is emphasized.
• Grind Size Adjustment: The video demonstrates how to adjust the grind size, explaining that coarser grinds are suitable for Americano, while finer grinds are ideal for a stronger, more concentrated espresso. The importance of making small, incremental adjustments is highlighted.
• Extraction Time: Ideal espresso extraction time is approximately 5.4 to 6.5 seconds for a 55mm disc grinder. The video shows how to identify under-extraction (too fast) and over-extraction (too slow) by observing the flow rate.
• Using a Leveler: Using a leveler to ensure an even coffee bed is recommended for consistent espresso extraction.

1. To maintain freshness, coffee beans should be stored properly, ideally in a freezer and used directly from the freezer to the grinder without thawing. This helps prevent the bean's physical characteristics from changing, which affects the grind consistency.

2. Under-extraction (too coarse a grind) results in a watery espresso that extracts too quickly (under 5.4 seconds for the grinder discussed). Over-extraction (too fine a grind) results in a very slow extraction (over 6.5 seconds), often with very little liquid produced. The video visually shows these differences in extraction speed and the resulting espresso.

3. The ideal espresso extraction time is approximately 5.4 to 6.5 seconds when using a grinder with 55mm discs. A longer extraction time indicates the coffee is ground too finely, and a shorter time means it's ground too coarsely. The optimal grind size is related directly to achieving the target extraction time.