Combine chocolate and coconut oil in a double boiler or carefully in a saucepan.
Heat until all the chocolate and coconut oil is melted.
Add the stevia.
Mix in the vanilla extract after removing from heat.
Line an 8-inch square pan or bread tin with parchment paper.
Evenly sprinkle the walnuts and raisins in the pan.
Pour the melted chocolate mixture over the raisins and walnuts.
Let it cool in the refrigerator or freezer.
Once the chocolate has set, cut it into squares.
Store the chocolate in a covered container. It can also be stored in a refrigerator or freezer if desired.
Now enjoy your healthy walnut dark chocolate bar which is a healthy treat!