Line a 9x13-inch baking pan and a standard baking sheet with parchment paper then set aside.
Using a stand or hand mixer, beat cream cheese until smooth, about 1 minute.
Add confectioners' sugar and beat until light and fluffy, about 2 to 3 minutes.
Add cocoa, salt, and vanilla and beat until smooth.
Melt ¼ cup chocolate chips in the microwave or over a double boiler.
Pour chocolate into cheesecake mixture and beat to combine.
Use a small scoop to portion a 1-inch mound of cheesecake. Press a raspberry half into the center.
Transfer scoop, flat side down, onto the prepared 9x13-inch baking pan. Repeat with remaining cheesecake.
Freeze at least 30 minutes or until firm; use your hands to roll each mound into a smooth ball.
Freeze at least 2 hours or overnight.
Melt remaining chocolate in the microwave or over a double boiler.
Use a fork to dip one cheesecake ball at a time into the chocolate, coating and letting the excess drip off before transferring to the prepared baking sheet (spacing at least ½-inch apart).
Drizzle remaining chocolate over coated truffles, one row at a time, sprinkling with crushed graham cracker crumbs before chocolate drizzle sets.