1 1/2cups (237 g)dark chocolate chips, 60% cocoa or higher, see note before starting
3/4cup (183 g)nonfat plain Greek yogurt
Instructions
Line an 8 inch x 4 inch loaf pan with parchment paper.
Add chocolate chips 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. Make sure your melted chocolate is hot. If it has cooled, then when you add the yogurt, it will cause the chocolate to harden immediately which you don't want.
Add in the yogurt and working quickly, stir with a spatula until the yogurt is fully and evenly incorporated. Your mixture should be uniform in color and no yogurt streaks should remain.
Pour mixture into your prepared loaf pan. Use your spatula to smooth and even the surface.
Place fudge into the fridge to firm up. When fudge is set, cut into small pieces with a sharp knife.
Notes
Dark chocolate: This recipe works best with dark chocolate that contains at least 60% cocoa. There are some dark chocolate brands that contain less than 60% and the fudge won't fully set if it is less than 60%. You likely also don't want a chocolate with 70% or higher because your fudge won't be sweet enough. I also recommend using a dark chocolate that contains milkfat or soy. Brands that don't contain any milk or similar milk substitute (such as Enjoy Life) don't work as well for this recipe. Without the milk or milk substitute, the chocolate is not as creamy and will immediately seize when the yogurt is mixed in. Here are the chocolate brands I tested this with:
Ghiradelli dark 60%, Amazon Fresh bittersweet 62% both worked well
Nestle dark 53% cocoa did not full set. The texture was like caramel chews. Nestle semisweet also did not fully firm up.
Enjoy Life dark chocolate, the chocolate firms up too fast. You don't need to wait for refrigeration but you also can't pour it into a pan and smooth it out to cut into squares. If you want instant fudge that doesn't look pretty than this does work. However I also found that this one wasn't sweet enough for me since Enjoy Life dark chocolate isn't very sweet to begin with.
This fudge has a slightly crumbly texture but it doesn't taste crumbly. It tastes very soft and creamy. The fudge is only lightly sweetened. If you prefer sweeter fudge you could make this with semisweet chocolate but just know that your fudge won't fully firm up and will be like caramel chews.
Make sure to use a thick Greek yogurt. I used Kirkland brand.
I let the fudge come to room temperature and then cut with a sharp knife. I also ran the knife back up and down the edges of some of the squares to help smooth the surface.
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.