Orea O2 Recipe for The Mad House Roast

November 11, 2026 · The Angry Roaster

Spotted: a flat-bottom brewer and a Brazilian comfort coffee getting very cosy on the counter. Three minutes of your undivided attention, and they will make it worth your while.

Short answer: Brew 18g of The Mad House Roast, ground medium, with 300g of filtered water at 93°C in an Orea O2. Bloom with 50g for 45 seconds, add the rest in two pours by 2:00, and expect a total time of about 2:45 to 3:15.

Coffee: 18g The Mad House Roast
Water: 300g, filtered
Temperature: 93°C
Grind: Medium, think coarse sand
Brewer: Orea O2 with a flat or wave filter, plus a gooseneck kettle and a scale
Total time: About 2:45 to 3:15

Steps

0:00. Pour 50g of water in a slow, steady spiral, saturating all the grounds. Let it bloom for 45 seconds.
0:45. Gently pour another 100g of water (150g total) in concentric circles, working from the centre outward. Take about 30 seconds.
1:15. Pour the remaining 150g of water (300g total) in the same gentle spiral. Aim to finish pouring by 2:00. Let the water level hover just above the bed.
2:00. Let it drain completely. Total brew time should land around 2:45 to 3:15.

Why this works

This recipe was built for the O2 and its flat bottom. The paper bends naturally and encourages a central flow, which keeps the cup clean and balanced without giving up sweetness or body. That suits The Mad House Roast, a natural Yellow Bourbon from Brazil with chocolate, caramel and nutty notes. Two simple pours after the bloom mean there is very little to get wrong.

If it tastes off

Sour or thin: Grind a little finer next time so the water spends longer with the coffee, and make sure the bloom wets all of the grounds.
Bitter or dry: Grind a little coarser, and keep your pours gentle so the brew finishes inside the 2:45 to 3:15 window.

Quick answers

Flat filter or wave filter?

Your call. Use flat filters for a juicier, fuller cup, or wave filters for a lighter, faster brew. Either way, the recipe stays the same.

Can I use another flat-bottom dripper?

The recipe was written for the Orea O2. On a different flat-bottom brewer, keep the same dose, water and pours, and adjust the grind until the timing lands.

How fine is "medium"?

Think coarse sand. If the total brew time lands well outside 2:45 to 3:15, change the grind before you change anything else.

The coffee this was built around: The Mad House Roast. If the cup is off, here is how to fix sour or bitter coffee.

You know you love it.
xoxo, The Angry Roaster

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