Long-Fermentation Sourdough Bread
Ingredients:
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2 cups all-purpose flour
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1 cup water
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⅓ cup sourdough starter
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3 tablespoons butter, melted
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1 tablespoon white sugar
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¾ teaspoon sea salt
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1 teaspoon oil, or as needed
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½ cup all-purpose flour, or more as needed
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1 teaspoon butter, or as needed
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1 egg, beaten