Cook Raspberries. Add fresh or frozen raspberries to a small saucepan over medium heat and cook until they break down and a sauce forms.
Chop Chocolate. Chop the chocolate bars into small pieces and add them to a bowl.
Strain Raspberry Sauce. Carefully transfer the raspberry sauce over a wire mesh strainer over the bowl with the chopped chocolate. Use the back of a spoon or a spatula to push the raspberry sauce through, leaving behind the seeds.
Make Raspberry Chocolate. Mix the raspberry sauce with the chopped chocolate using a spatula until it melts into a mixture. If the chocolate is not melting, add the bowl to the microwave for 10-second increments, or place the glass bowl over a double boiler to mix.
Transfer to Molds. Add a spoonful of the melted chocolate truffle filling to the molds. Place the molds in the refrigerator to set the truffles for about 15-30 minutes.
Decorate & Enjoy. Once the truffles are set, you can enjoy them as is or decorate them to make them more festive.
Notes
To make without a mold: After mixing the melted chocolate with the raspberry sauce in a bowl, store the mixture in the fridge for 20-30 minutes, then scoop out truffles with a cookie scoop and roll them into a ball.