Prepare and bake cake according to package directions. Cool completely. Crumble cake into a large bowl.
In a small bowl, combine hot water and coffee granules; stir until dissolved. Add the frosting, cocoa and chocolate syrup; stir until combined. Add to cake; beat on low speed until blended. Stir in chocolate chips. Shape into 1-in. balls.
In a microwave, melt candy coating; stir until smooth. Dip balls in coating mixture; allow excess to drip off. Place on waxed paper; sprinkle with toppings of your choice. Let stand until set. Store in airtight containers. Yield: about 8 dozen.