Combine coconut oil and chocolate in a pan. Allow to melt over low heat or use a microwave oven.
Dissolve half of the sweetener into the mix and season with salt to taste.
Prepare 12 small cupcake molds. Divide the melted chocolate mixture into two bowls. Spread one of the bowls into the 12 molds and make sure to cover the sides of the molds. Refrigerate until set.
Microwave peanut butter until it’s melted. Remove after 20 seconds and stir. Replace in the microwave for another 20 seconds and repeat until the peanut butter is completely melted.
Add the remaining sweetener into the melted peanut butter and stir thoroughly until well combined.
Evenly distribute the melted peanut butter mix among the 12 chocolate-covered cupcake molds. Allow to chill in the fridge at least 1 hour till set and ready.
Remove from the refrigerator and pour the remaining chocolate mixture on top of the molds to enclose. Replace in the fridge to chill.