According to the Skippy Peanut Butter website a 40 oz. jar of peanut butter is equal to 4 3/8 cups. A slang term for peanut butter during World War II was monkey butter.
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According to the Skippy Peanut Butter website a 40 oz. jar of peanut butter is equal to 4 3/8 cups. A slang term for peanut butter during World War II was monkey butter.