INGREDIENTS
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3/4 cup butter
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1 1/2 cups white sugar
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3 eggs
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1 teaspoon vanilla extract
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1 1/3 cups all-purpose flour
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1/2 teaspoon baking powder
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1/2 teaspoon salt
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3 tablespoons cocoa powder
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1/2 cup chopped walnuts (optional)
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4 cups miniature marshmallows
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1 1/3 cups semisweet chocolate chips
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3 tablespoons butter
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1 cup peanut butter
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2 cups crisp rice cereal