Florence's Famous Cinnamon Rolls
Ingredients:
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2 (.25 ounce) packages active dry yeast
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¼ cup warm water (110 degrees F (43 degrees C))
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½ cup instant potato flakes
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1 ½ cups milk
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½ cup water
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⅓ cup white sugar
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1 ½ teaspoons salt
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2 eggs
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6 cups all-purpose flour
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½ cup margarine, softened
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⅓ cup butter, softened
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¾ cup brown sugar
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1 ½ tablespoons ground cinnamon
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½ cup raisins
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1 ½ cups unsifted confectioners' sugar
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1 tablespoon butter, softened
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⅛ teaspoon vanilla extract
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2 tablespoons warm water, or as needed