Butter a large cookie sheet and set aside (seriously, do this first -- you won't have time later).
In a large heavy pan or stockpot, over medium heat, melt
4 tablespoons butter, cut into pieces
Add to melted butter
2 cups sugar
2 teaspoons sea salt (or 1 teaspoon table salt)
1 teaspoon vanilla
Stir constantly with a wooden spoon and watch closely -- you want this to caramelize to a nice golden color, but you're always courting disaster with caramel (this could be a whole other blog entry, my struggles with melting sugar). The original recipe said to stir for a couple minutes; mine took about ten. The sugar here really doesn't melt fast.
Once the caramel is melted and smooth, quickly stir in
6 cups broken pretzel pieces
Working very fast (because the candy will set), stir so that the pretzel pieces are all covered. Immediately pour out onto the greased cookie sheet, spreading the praline pretzels out in an even layer. Once they have cooled, break them up into smaller chunks. (I used whole small pretzels but found that I had to take a knife to them once they'd cooled because the chunks were too massive to bite into. Mini-pretzel halves would be better.)
Costco has huge bags of mini pretzels for about NT$250. I divide them up into gallon-sized zip-locked bags so they stay fresher. If you have the freezer space, you can keep them even longer that way. Everything else is easily found here.