In the bowl of a stand mixer, add the butter and sugar and beat on medium speed until light and fluffy, about 2 minutes.
Add the flour, sweetened condensed milk, and vanilla and beat on low speed until combined. Add the chocolate chips and beat until just combined.
Cover the bowl with plastic wrap and refrigerate until the mixture has firmed enough to scoop into balls, about 30-60 minutes.
Line a baking sheet with wax or parchment paper. Once the dough is firm, scoop and roll the cookie dough into 1-1 ½ inch balls.
Place the cookie dough balls on the prepared baking sheet and freeze for 1-2 hours or overnight.
DIP COOKIE DOUGH BALLS:
When you’re ready to dip the cookie dough balls, line another baking sheet with wax paper or parchment.
Then, melt the chopped chocolate in a heatproof bowl set over a pot with about 1 inch of simmering water.
One at a time, dip each chilled cookie dough ball into the chocolate, coating it entirely in chocolate and using a rubber scraper to remove excess chocolate from the bottom of the truffle.
Transfer the truffle to the prepared baking sheet and sprinkle with mini chocolate chips. Repeat with the remaining cookie dough balls.
TO FINISH:
Place the truffles in the freezer to fully set for 1 hour. Then, remove them from the baking sheet and place them in an airtight container.
Refrigerate the truffles until ready to serve.
Notes
How To Heat-Treat Flour:
Heat-treating your flour is essential to ensure it's safe for no-bake recipes.
Preheat your oven to 350°F (175°C).
Spread the flour evenly on a baking sheet lined with parchment paper.
Bake for 5-7 minutes, stirring halfway through, until the flour reaches 165°F. Use an instant-read thermometer to ensure accuracy.
Let the flour cool completely before using it in the recipe.