Prepare the cookie dough base by creaming together the softened butter, brown sugar, and granulated sugar in a large bowl until light and fluffy, about 2-3 minutes. The proper creaming creates the foundation for that authentic cookie dough texture.
Add the milk and vanilla extract to the butter mixture and beat until fully incorporated. These liquid ingredients help achieve the right consistency without using eggs.
Gradually mix in the heat-treated flour and salt until just combined. Be careful not to overmix, as this can make your truffles dense rather than tender.
Fold in the mini chocolate chips by hand using a spatula, distributing them evenly throughout the dough. Mini chips work better than regular ones as they distribute more evenly in these small treats.
Chill the dough for 30 minutes in the refrigerator until firm enough to handle. This makes rolling much easier and cleaner.
Line a baking sheet with parchment paper and use a small cookie scoop or tablespoon to portion the dough.
Roll each portion into smooth 1-inch balls between your palms and place them on the prepared baking sheet. If the dough becomes sticky, refrigerate it for 10 minutes before continuing.
Freeze the dough balls for 20 minutes until firm. This crucial step ensures they hold their shape during the dipping process.
Melt the chocolate and shortening in a microwave-safe bowl in 30-second intervals, stirring between each until smooth. The shortening prevents the chocolate from becoming too thick for dipping.
Dip each chilled dough ball into the melted chocolate using a fork or dipping tool, tapping gently to remove excess. Work with just a few balls at a time, keeping the rest in the freezer to maintain firmness.
Place dipped truffles back onto the parchment paper and allow the chocolate to set completely, about 30 minutes at room temperature or 15 minutes in the refrigerator.
For optional decoration, drizzle with melted white chocolate using a piping bag or fork for a professional finish.