With a rolling pin, crush coffee granules into a fine powder in a Ziploc bag. Place in an airtight container. Add the sugar, milk powder, creamer, and cocoa. Mix well. Store in a cool, dry place for up to 1 year. Makes 7 batches.
In a blender, combine the ice, milk, and 1/2 c of mocha mix. Cover and process on high until smooth. Pour into glasses. Top with whipped topping (optional).