The “secret ingredient” in this viral headline is an egg—often the whole egg, including the shell. It’s an old brewing method commonly called Swedish egg coffee or Scandinavian/church coffee.
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MyRecipes
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☕ Why would anyone put an egg in coffee?
The egg is mixed with coarse coffee grounds and then boiled with water. As the egg proteins cook, they coagulate and help gather fine coffee particles and sediment. The result is traditionally described as a clearer, smoother, less bitter cup. The crushed eggshell, which is largely calcium carbonate, may also help buffer some acidity.
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MyRecipes
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🥚 How the traditional method works
A commonly described version uses:
Coarse-ground coffee
1 whole egg, shell included
Water
A saucepan and strainer
The egg is mixed into the grounds, added to boiling water, gently boiled for several minutes, then allowed to settle and strained.
M
MyRecipes
It doesn’t normally make the coffee taste like eggs. The purpose is to clarify and mellow the brew.
Is it actually a “secret” from Grandma?
Not really. It’s a real traditional coffee-making technique, particularly associated with Scandinavian-American communities and old-fashioned church/community coffee. The dramatic “Grandma had a secret” wording is largely storytelling/viral-content style.
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Homemaking.com
One caution: if using raw egg, use clean, properly handled eggs and cook the mixture thoroughly rather than treating it like a raw-egg drink.
If you’d like, I can also give you the exact traditional recipe for 1, 2, or 4 cups, including the amount of coffee and egg.
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