Line an 8 inch x 4 inch loaf pan with parchment paper.
Add chocolate chips and peanut butter 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 the mixture is smooth and uniform in color. You can also melt the chocolate and peanut butter on the stove using the double boiler method.
Pour fudge into your lined baking loaf pan. Use your spatula to smooth and even the surface.
Place the fudge into the freezer until set. This should only take about 30 minutes. Bring the fudge back to room temperature before cutting and serving. Uneaten fudge can be stored in the fridge or freezer.
Notes
This fudge is not meant to be super sweet. If you prefer sweeter you can use milk chocolate instead of semi-sweet.
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.