Melt semi-sweet chocolate chips in microwave in 20 second intervals, or until you can stir the melted chocolate without any lumps. Be careful not to put them in there for too long and walk away—the chocolate can burn!
Once chocolate has fully melted to the point where it can be stirred smooth with a spoon, drizzle in the can of sweetened condensed milk. Mix until combined.*
Set the mixed chocolate in the refrigerator to firm up for at least 30 minutes while you choose your toppings. (I went with walnuts, a classic choice!)
Pour walnut pieces into food processor and pulse until small and crumbly, a texture coarser than flour.
When your truffle ''dough'' has set, remove it from the refrigerator or freezer and use a 1 oz cookie scoop to portion it out. I like to roll the balls of dough in my hands to create a perfect sphere, but if you're in a rush and don't mind them being flat on the bottom, that's ok, too! Toss the 1 oz sphere of chocolate truffle into your processed walnuts and toss until coated.**
Do this until you've used up all of your truffle dough!
*If you notice your chocolate starts to get too thick as you're streaming in the sweetened condensed milk, you can pop the mixture back in the microwave for a few seconds. This will be more like a fudgy dough in the end, so don't panic!**Sometimes, I'll press some walnuts into the sides to make sure they stick, then roll in my hands again to make sure they are round.Alternate version:Go for white chocolate chips instead of semi-sweet chocolate chips to make a white chocolate version of this recipe!If you have a nut allergy, try another topping like cocoa powder, espresso beans, or dried fruit. Nut-free chocolate truffles are just as delicious!