Potato Doughnuts

Ingredients
Make the Dough
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High Protein Flour 500.0 g
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Flour 500.0 g
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Instant Yeast 15.0 g
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Bread Improver 5.0 g
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Sugar 100.0 g
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Skim Powder Milk 50.0 g
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Salt 15.0 g
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Yolk 120.0 g
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Cake Margarine 150.0 g
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Cold Water 550.0 ml