We got this recipe from "The Compassionate Cook or 'Please Don't Eat the Animals!' A Vegetarian Cookbook" by P.E.T.A. and Ingrid Newkirk, National Director of P.E.T.A. These are really easy to make and are excellent. When you make them, don't be surprised if they don't last long.
Line a cookie sheet with aluminum foil.
In a large mixing bowl, combine the crumbs, peanut butter, sugar, and margarine and mix thoroughly with a wooden spoon. Roll this mixture into 1-inch balls, place on the cookie sheet, and chill in the refrigerator.
Meanwhile, place the chocolate chips in a small plastic sandwich bag and melt carefully (do not overheat) in a microwave. (If you prefer, melt the chips in a small bowl over hot water, then pour the melted chocolate into the sandwich bag.)
Snip off a tiny corner (about 1/16 inch) of the baggie and squeeze chocolate from the corner, drizzling thin "tiger stripes" of chocolate over the chilled cookies.
Return cookie to the refrigerator and chill until the chocolate is firm, about 30 minutes.
Makes 3 to 4 dozen balls