1 (12 oz.) pkg. semi-sweet chocolate chips
1 c. chunky peanut butter
3 c. miniature marshmallows
3/4 c. raisins (optional)

Microwave chocolate chips and peanut butter in 2 quart bowl on medium (50%) 2-3 minutes or until melted, stirring after each minute. Fold in marshmallows. Pour into foil lined 8 inch pan, chill and cut into squares.