Old Fashioned Chocolate Drop Fudge

1 (12 ounce) bag old-fashioned chocolate drops (with white filling)
1 cup peanut butter
1 tablespoon butter
2 handsful semisweet chocolate chips

Place all ingredients in a microwave-safe bowl and heat on HIGH for 2 minutes. The chocolate drops may not look melted. Mix together well, making sure to stir in any of the white center that may clump a little. Pour into an 8-inch square pan and let cool at room temperature.