[header] How to make chocolate shell sauce [title] Mix the chocolate, oil, and corn syrup. [step] Add ½ pound (250 g) of finely chopped dark chocolate , 1 cup (200 g) of refined coconut oil, and 6 tablespoons (125 g) of light corn syrup to a large microwave-safe bowl. Stir the ingredients together but don't worry about fully combining them. 
[substeps] For the best chocolate shell sauce, use 66 to 72% dark chocolate. Be sure to use refined coconut oil, which has more of a neutral flavor.