Cover a cookie sheet with foil.

Melt the peanut butter chips and shortening according to package directions. Once melted stir in 1/2 cup of the pretzels.

Melt the chocolate chips according to package directions. Once melted stir in 1/2 cup of the pretzels.

Alternate spooning the melted chocolate chips and melted peanut butter chips on to the cookie sheet. Then use a spatula to semi blend the two and spread it evenly over the foil.

Let sit for 2 hours to firm up or put it in the freezer for 30 minutes. Break into pieces.