Mix peanut butter and powdered sugar until smooth.
Spread mixture on half the pretzels and top with the rest to make sandwiches.
Melt caramels with milk in microwave, stirring every 30 seconds.
Spoon caramel over pretzel sandwiches and chill 10 minutes.
Melt chocolate with coconut oil until glossy.
Dip sandwiches halfway into chocolate, place on parchment.
Sprinkle with flaky salt before chocolate sets, chill until firm.
