In a microwave safe bowl, microwave your flour for 60-90 seconds, stirring halfway through. Set aside to cool completely.
In a medium mixing bowl, cream together softened butter and brown sugar. Once smooth, mix in the milk and vanilla extract.
Sprinkle in the heat-treated flour and mix to form a dough, then fold in ½ cup of mini chocolate chips.
Line a baking sheet with parchment paper or a silicone baking mat, then place half of the Ritz crackers upside down on the baking sheet.
Working one by one, roll the dough into 2 tsp balls, then top each cracker with a dough ball.
Sandwich each dough ball with another with cracker, pressing down gently to avoid breaking the crackers.
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 cookie dough sandwiches and immediately sprinkle with remaining mini chocolate chips.
Transfer to the fridge or freezer for 15 minutes to set the chocolate drizzle. Once set, carefully break off the excess candy-coating pieces around each cookie before enjoying!