1. Prepare the coffee-and-egg mixture (makes 3 mornings' worth): Combine 1 cup ground coffee with 1 slightly beaten egg and the crushed eggshell. Stir to coat the grounds evenly. This binding step — called clarification — uses egg protein to attract and clump fine coffee particles so they settle out of the finished brew, producing a clearer cup. Divide the mixture into three equal portions (roughly 1/3 cup each) and store two portions in a tightly covered container in the refrigerator (or a cool place, below 40°F / 4°C) for use over the next two mornings.
2. Scald the coffee-pot (technique: scalding — pouring boiling water into a vessel to preheat it and eliminate any off odors): Fill your coffee-pot with boiling water, swirl, and discard the water. This step conditions the pot and helps maintain brewing temperature.
3. Combine one portion of the coffee-egg mixture with 1/3 cup (80 ml) cold water in a small bowl or measuring cup, stirring to form a loose slurry. Turn this mixture into the scalded coffee-pot.
4. Add 1 pint (2 cups / 480 ml) freshly boiled water to the pot. Place on the stovetop over medium-high heat and bring to a boil, then boil for 3 minutes. The surface will show a rolling boil and a dark, aromatic steam. Do not exceed 3 minutes; prolonged boiling makes the coffee bitter.
5. Remove from heat and let the pot stand undisturbed on the back of the stove (or on a warm trivet away from direct heat) for 10 minutes. During this rest the egg-and-grounds mass sinks to the bottom, clarifying the liquid above. The coffee is ready when the liquid in the upper portion of the pot is clear and deep amber-brown with no floating grounds visible.
6. Pour carefully, keeping the pot as level as possible to avoid disturbing the settled sediment. Serve immediately.
Your family has recipes like this too.
The handwritten cards, the dishes only grandma remembers — save them before they fade. Free to start.