Melt the chocolate chips and add 1/2 tbsp of chocolate into each cup. Refrigerate for at least 30 minutes until the chocolate is solid.
In the microwave or over a double boiler, soften the sunflower seed butter so that it is thinned out a bit. Add the vanilla and sea salt and mix well.
Add 1 tsp of the sunflower seed butter mixture to each cup. Add 1/2 tsp of chocolate to cover and refrigerate for at least 30 minutes until the cups are solid.