Space out half of your pretzels on a baking sheet lined with parchment paper or a silicone baking mat, then set aside.
Heat-treat your brownie mix by pouring it into a microwave safe bowl and microwaving for 90 seconds, stirring every 30 seconds, or until it reaches 160 degrees F.
In a medium mixing bowl, combine the heat-treated brownie mix, softened butter, and milk then mix to form a dough consistency.
Using a 1 tsp triggered cookie scoop, scoop one brownie batter ball on top of each pretzel snap.
Sandwich each scoop of brownie batter with another pretzel, then set aside.
In a microwave safe bowl, combine semi-sweet chocolate chips with vegetable oil. Microwave in 30 second intervals, stirring in between, until melted and smooth.
Drizzle the melted chocolate over the pretzel sandwiches and immediately sprinkle with mini chocolate chips.
Transfer to the fridge for 25-30 minutes to set the chocolate drizzle. Once set, carefully break off the excess candy-coating pieces around each pretzel before enjoying!