Preheat oven to 350°F °F. Line an 8×8 baking dish with parchment paper.
In a food processor, grind pretzels to a fine consistency, and set aside. (pretzels can also be placed in a large ziplock bag and gently crushed with a rolling pin or heavy object)
In a saucepan over low heat, melt the peanut butter and condensed milk together and stir to combine.
Add the pretzel crumbs to a large bowl and mix in the peanut butter mixture, stirring until well coated.
Press the crumb mixture into the prepared dish and bake for 15-20 minutes or until set.
Remove from the oven and sprinkle on the chocolate. Return to the oven for 1-2 minutes, remove, and use an off-set spatula to spread the chocolate chips evenly across the top. (if desired, garnish with a pretzel on top while chocolate is warm)
Cool before cutting.
