Prepare cookie dough according to package directions; add yellow food coloring if desired. Stir in peanut butter chips. Shape into 1-1/4-in. balls; place 2 in. apart on ungreased baking sheets. Flatten slightly with a glass. Bake at 375° for 9-10 minutes or until lightly browned. Remove to wire racks to cool.
Place coconut in a plastic bag; sprinkle 5-6 drops green food coloring into bag and shake until color is evenly distributed.
In a small bowl, cream butter until smooth. Add the confectioners' sugar, cocoa, milk and vanilla; beat until smooth. Frost the bottoms of 22 cookies; sprinkle with coconut. Top with remaining cookies and gently squeeze together.
Editor's Note: was "You may substitute your favorite sugar cookie recipe for the cookie mix, eggs oil and water; just add the peanut butter chips" Now "You may substitute your favorite sugar cookie recipe for the cookie mix; just add the yellow food coloring if desired and the peanut butter chips" EO 6-24-05
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