In food processor pulse pretzel sticks until they are fine crumbs (or place in bag and smash them with a utensil)
2 cups thin pretzel sticks
In medium bowl, mix together the pretzel crumbs, melted butter, confectioners' sugar, and 1 cups of the peanut butter
1-1/2 sticks butter, 1-1/2 cups confectioners sugar, 1-1/4 cups peanut butter
Press peanut butter mixture into bottom of an ungreased 9x9 pan
Melt remaining peanut butter and chocolate chips together in the microwave in 30-second intervals, stirring in between
1-1/2 cups milk chocolate chips
When the chocolate mixture is smooth, pour over top of the peanut mixture in the pan
Refrigerate for 30 minutes, then cut into squares and devour!