The home brew lab
Turn a brewing question into a comparison you can repeat.
These six guides are original experimental plans, not reports of physical tests performed by BrewLab. All recipe numbers are illustrative starting conditions. Results are yours to observe; no winners or measured outcomes have been invented.
A simple loop
- Choose one question and prepare the A/B recipes.
- Record actual conditions and taste before interpreting.
- Compare the two saved cups, repeat with changed order and keep the uncertainty.
Creating recipes is optional and saves only in this browser. It never creates a brew result or deducts beans. Back up local work before clearing site data.
One grinder step, two cups
Can you notice a repeatable difference from one small grinder adjustment with your usual filter coffee?
Read the protocol →RatioSame dose, different water
With your dose held fixed, how does a 1:15 recipe compare with 1:17 for strength and enjoyment?
Read the protocol →TemperatureA three-degree kettle comparison
Does 90°C versus 93°C change your experience of the same measured filter recipe?
Read the protocol →PouringOne main pour or two?
With total water fixed, how does splitting the post-bloom water into two additions affect your brew?
Read the protocol →EspressoAn espresso yield comparison
At the same 18 g dose and grinder setting, do you prefer 36 g or 45 g collected espresso?
Read the protocol →Blind tastingTaste first, reveal the recipe later
Does your preference between 1:15 and 1:17 remain when another person hides the recipe identities?
Read the protocol →Start with what you have
Use familiar coffee and equipment rather than buying specialist gear for these plans. A scale and a consistent measurement convention are more useful than assigning a score to an uncontrolled cup. If a method or temperature is unsuitable for your equipment, skip that protocol or redesign both recipes explicitly.
My recipes and comparisons · Bean library · Plan a next-step experiment from a recorded cup