With the warmer spring weather, I tried something different when making my coffee one day: I decided to brew it using the sun’s heat. I was hoping for a different, milder taste and I was right!
The basic coffee-making equation doesn’t change: use your favorite coffee, use as much or as little of it as you prefer — but instead of putting it in the coffee machine, put it in a glass pitcher and add cold, filtered water. Then, cover the pitcher to stop insects or dust from getting into it and set it on the window sill or somewhere outside, in direct sunlight.
Monitor it periodically. Once it gets hot to the touch, the coffee’s done. You can leave it out a little longer if you want a stronger coffee, or leave it less if you don’t. I live in a temperate climate and in moderately warm spring weather (18-25° Celsius), my coffee was ready in 1½ – 2 hours. If you live in a warm climate, it should be ready even faster, maybe even in 30 minutes or so.
The taste of sun-brewed coffee is unique: it’s mild with no bitter aftertaste and there’s a distinct caramel flavor to it.
A few pieces of advice:
- Use alkaline water, it will make it taste even better
- Use a French Press, it’ll make it much easier to pour the coffee out of the pitcher once it’s ready
- Use regular filter-ground coffee even though you’re using a French Press… it doesn’t make sense at first, but know that the water temperature in the sun will only be about 40-50° Celsius as compared to 90-100° Celsius with boiling water. This means you’ll need a finer grind in order to get more flavor out of the coffee.