Line an 8 inch x 4 inch loaf pan with parchment paper.
Add chocolate to a large microwave-safe mixing bowl. Heat in 15-30 second intervals, stirring in between with a spatula until chocolate is completely melted and smooth. You can also melt the chocolate on the stove using the double boiler method.
Add the peanut butter to the chocolate. Mix with a spatula until the peanut butter is fully incorporated and no streaks of peanut butter remain. The mixture should be smooth and uniform in color.
Stir in the honey and mix until it is fully and evenly incorporated. You can start with 3 tbsp and taste and adjust as needed. I usually add 3-4 tbsp. You can add a little more than that but if you add too much then your fudge will not set. Your mixture should thicken slightly after stirring in the honey.
Pour your mixture into your lined loaf pan. Use a spatula to spread the mixture evenly across the pan and smooth the surface.
Place the fudge into the fridge until set. This should take about an hour. Once it is firm, remove it from the fridge and cut the fudge into pieces using a sharp knife. Fudge should be enjoyed soon after it is removed from the fridge. If it sits out at room temperature it will become a little too soft to hold so any uneaten fudge should be stored in the fridge.
Notes
This recipe needs honey or a similar thick sweetener to work. See post for more details.
If you prefer to use dark chocolate instead of unsweetened chocolate, you will need to use about 1 cup of chopped dark chocolate or dark chocolate chips. You could also skip the honey if you find the dark chocolate provides enough sweetness.
If you want to make this low carb or keto-friendly, you can substitute the honey with a keto-friendly honey or syrup. Just make sure it is a thick syrup and not a thin syrup. Alternatively, you can also skip the syrup and use a sugar-free sweetened dark chocolate. If you use sugar-free dark chocolate, you will need about 1 cup of chopped sugar-free dark chocolate.
The estimated nutrition is calculated using 3 tbsp of honey and for the recipe as written (and not the keto or other alternatives).
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.