In a small microwave-safe bowl, combine the chocolate chips with 1 tablespoon of vegetable shortening—microwave on high for 30 seconds. Stir. 

Microwave for an additional 30 seconds. Stir again. By this point, your chocolate should be smooth and ready to dip. 

Dip the Oreos one at a time into the chocolate, flipping it over to coat the entire Oreo evenly. Use a fork to remove the Oreo from the chocolate and tap the fork lightly on the bowl's edge to allow any excess chocolate to drip off. 

Place the chocolate covered Oreo on a parchment-lined baking sheet or a baking rack— this will keep it from sticking once the chocolate has cooled. 

Decorate the Oreo with candy eyes or sprinkles or a drizzle of white or orange chocolate. Make sure to add any decorations before the chocolate has hardened, or they won’t stick. 

Repeat with 9 additional Oreos. 

Repeat the same melting process for the remaining two chocolates.

Place the finished Oreos in the refrigerator and allow them to chill for at least 20 minutes. This will help set the chocolate. 

Store in an airtight container in the fridge for up to 2 days.