Use a double boiler, or a makeshift one with a pot and a bowl to melt the chocolate chips.
Once the chocolate chips are melted stir in the peanut butter until it is well blended.
Place pretzels in a medium-sized mixing bowl and pour the melted chocolate peanut butter mixture over the pretzels. Stir well to make sure you evenly coat all of the pretzels.
Place a piece of parchment paper on a baking sheet and spread the pretzels over the parchment paper. Cool in the freezer for 5 minutes before devouring.