Using a double boiler or microwave, melt the chocolate and peanut butter into smooth, creamy, goodness.
Turn off the heat and add the peanuts and pretzel pieces and stir until coated.
Line an 8 x 8 baking dish/pan (a 9x9 baking dish/pan will work, too) with parchment paper and pour in the chocolate mixture. Place it into the refrigerator for an hour or until the chocolate is solid. If you’re in a rush, you can place it in the freezer for 30 minutes.
Once it's solid all the way through, use a butter knife to crack into small pieces. Place the pieces in an air-tight container and store it in the refrigerator for up to a week.