INGREDIENTS
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1/2 cup vegetable shortening
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2 (1-ounce) squares unsweetened baking chocolate
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2 eggs
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1 cup sugar
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1 cup all-purpose flour
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1/4 teaspoon baking powder
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1/4 teaspoon salt
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3 tablespoon strong black coffee
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1 teaspoon vanilla extract
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1 cup miniature marshmallows
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1 cup chopped walnuts