Here's a recipe that I use when I want the covered pretzels. it was original for Yogurt covered almonds but I just subsitute the pretzels.

1/2 pound white almond bark, chopped
2 cups pretzels (or almonds)
1/4 cup plain yogurt

Place almond bark in a microwave-safe bowl and microwave on medium, uncovered, for 3 minutes or until melted, stirring twice.
Stir until smooth and add almonds and yogurt.
Spoon onto wax paper and spread into an even layer. Allow to cool before breaking into pieces.

Makes 24 pieces.

Hope this works for you