Assemble a pour-over coffee rig using a carafe, filter holder, and filter set on a digital kitchen scale.
Place the coffee inthe filter and the ice in the carafe.
Very slowly pour 100 grams of the water over the coffee in a spiral pattern. This step should take about 1 minute. Let the coffee sit for 30 to 40 seconds to bloom. Tare the scale, then, working in three batches, very slowly pour over the remaining 175 grams water in the same spiral pattern over the coffee. This step should take 2 to 3 minutes total. If using an electric kettle with a thermostat, return the kettle to the heater in between batches.
When the coffee is finished brewing, remove the filter holder and discard to compost the grounds.Serve the coffee with any remaining ice, or strain it out for a stronger brew.