open packages of dough, separate into 4 equal portions, tint 1 portion red, 1 portion yellow, 1 portion orange ( mixing red and yellow) 1 portion turquoise ( mixing blue and green)

divide each color portion of dough into thirds, measure donkey shaped cookie cutter ( or desired shape) and find a container as deep as the cookie cutter is tall* in container alternately layer colors of dough in desired order. cover; refrigerate until firm

heat oven to 350 Fahrenheit, line cookie sheets with cooking parchment paper remove dough from container, cut into 1/4-inch slices on cookie sheets place slices 2 inches apart

bake 6-10 minutes or until set while still warm, cut cookies with cookie cutter in 16 of the cookies, use small round cutter to cut out center of donkey gently remove cut out portion of cookie. cool 5 minutes remove from cooking sheets to cooling racks cool completely

In small bowl mix powdered sugar, milk, corn syrup, and vanilla, wisk until smooth, tint with desired food coloring, spoon icing into decorating bag fitted with small round tip or small resealable food-storage plastic bag with tiny corner cut off

for each sandwich cookie pipe icing around edge of 1 whole donkey with cut out center; pipe icing around edge of donkey fill hole in center with M&M's top with donkey cookie