1. Insert wooden stick into each washed and dried apple. Cover tray with wax paper.
2. Stir together peanut butter chips and oil in medium microwave-safe bowl. Microwave at MEDIUM (50%) 1-1/2 minutes or until chips are softened. Stir until melted. If necessary, microwave at MEDIUM an additional 15 seconds at a time, stirring after each heating, just until chips are melted when stirred.
3.Stir together powdered sugar and cocoa; gradually add to melted chip mixture, stirring until smooth. Microwave at HIGH 1 minute or until very warm.
4. Dip apples in mixture; twirl to remove excess coating. (If coating becomes too thick, return to microwave for a few seconds or add additional oil 1 teaspoon at a time.) Roll lower half of coated apple in coconut or chopped chips, if desired. Allow to cool on prepared tray. Refrigerate, if desired. 10 to 12 apples.