Combine peanut butter, butter, confectioner's sugar, and vanilla. Mix
thoroughly. When well-combined, form into small balls to resemble Buckeyes
about an inch or less in diameter. Melt chocolate in the microwave or in top
of double boiler (do not boil water), and add a block of paraffin, if desired.
(The paraffin will help the chocolate solidify.) Stir the chocolate mixture
frequently.
Use a toothpick
to dip the balls of peanut butter mixture into the melted chocolate, leaving a
small portion on the top of the Buckeye uncoated to form the "eye". Gently,
with a spoon or your finger, rub out the small toothpick hole in the "eye".
Place the Buckeyes on waxed paper on a cookie sheet and refrigerate or freeze
until set.