In a medium sized bowl, cream together the butter, brown sugar, and white sugar until smooth.
Stir in the vanilla and milk.
Add in the flour, and salt and mix together till everything has the texture of cookie dough. (Add in more milk or flour as needed.)
Fold in the chocolate chips.
Roll the cookie dough into balls, about 2 tsp in size.
Place one ball on top of a pretzel. Sandwich the cookie dough with another pretzel on top. Place on a baking sheet lined with parchment or a silicone liner.
Place pan in the freezer for 20 minutes.
Melt chocolate chips and coconut oil in a small bowl for about 60 seconds, stirring every 30 seconds.
Dip the prepared pretzels half way into the melted chocolate and then back onto the baking sheet.
Top with sprinkles if desired, or melted white chocolate.
Place pan in the fridge to allow chocolate to set.
Enjoy. Leftover pretzel bites can be stored in an airtight container for 4-5 days in the fridge.