2 1/2cupsfinely chopped chocolateabout 370g -- see note above
14ozsweetened condensed milk300 ml
1/4cup + 2 tablespoonssmooth peanut butterdivided
1/4cupchopped salted peanuts
Line an 8x8" pan with wax or parchment paper.
In a large microwave-safe bowl, combine chocolate, condensed milk and ¼ cup peanut butter.
Microwave on high in 20-25 second intervals, stirring well each time, until smooth (mixture will be thick -- do not overcook!).
Spread half into prepared pan. Place a piece of wax paper on top and press fudge into the pan. Warm 2 tablespoons peanut butter for 15 seconds in the microwave, and drizzle half over fudge in pan. Top with half peanuts and half pretzels.
Repeat layers one more time, with the remaining fudge, peanut butter, peanuts and pretzels, using the same piece of wax paper to press your fudge into the pan (it will be impossible to spread otherwise!).
Refrigerate until set, or place in the freezer for 15-20 minutes until firm. Slice and serve. Store leftovers in the refrigerator or freezer.