Bake the brownie mix in a lined 9x13 pan as directed.
Once cooled, trim the edges and cut into 48 squares.
Preheat oven to 300°F and heat-treat flour for 5-7 minutes.
Cream butter, sugars, and vanilla until fluffy.
Mix in heavy cream, then gradually add flour and salt.
Stir in chocolate chips.
Scoop and roll cookie dough into 45-48 balls, freeze for 30-45 minutes.
Flatten brownie squares, wrap around frozen cookie dough, and freeze again.
Melt dark chocolate, coat brownie bombs, and drizzle with milk chocolate.
Let chocolate harden before serving.