Protein cookies How to make

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  1. Place the egg whites in a water-free and oil-free basin , add a few drops of lemon juice and half the powdered sugar

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  2. Beat the eggs at high speed Form into a fine foam, add the remaining powdered sugar

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  3. Beat the egg whites at high speed until they are not flowing and have lines.

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  4.Put the egg whites into a piping bag, lay tinfoil on the baking sheet, and squeeze into small bubbles

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  5. Preheat the oven to 100 degrees and bake for 60 minutes, then simmer for 20 minutes and take it out