Heat a saucepan half-filled with water over a stove on low-medium heat until just simmering. Place a heat-proof bowl over the simmering water and place the cacao butter in the bowl. Melt the cocoa butter slowly and remove it from heat immediately once it has completely melted to liquid form. Be careful not to burn or boil the cacao butter; it should be just hot enough to melt.
Mix in all other ingredients and stir to combine.
Sprinkle the cacao nibs and goji berries into your silicone moulds. Pour the chocolate mixture into each mould over the nibs and berries.
Place in the fridge and allow to set completely.
Remove from moulds once set.
The chocolates need to be kept in the fridge until serving.
For a beautiful Valentine’s Day gift, wrap the chocolates in brown paper or cellophane and enjoy with loved ones.