"Yes you should learn how to make French Onion soup at home! It's easy because once you learn the technique the rest is easy and cheesy!..."
INGREDIENTS
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6 tablespoons (90g) unsalted butter, plus more for toasts
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3 pounds (1.4kg) yellow or mixed onions, sliced 1/8 inch thick
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Kosher salt and freshly ground black pepper
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1/2 cup Cognac or brandy
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2 quarts chicken stock
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3-4 sprigs thyme
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1 teaspoon cider vinegar (totally optional) but I love the slight bite it gives it
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LOADS OF CHEESE