Preheat oven to 350 degrees. Mix together the flour, powdered sugar, and salt in a food processor with a steel blade. Add the butter and pulse a few times until you have coarse crumbs.
Place the mixture in a 9 x 13 dish and press down firmly using a fork to form a crust. Bake for 25 minutes.
While the crust is baking, mix together the Reese's Pieces, white chocolate chips, dried cranberries, coconut, and pecans in a bowl. Remove the crust from the oven, and pour the chocolate mixture on top.
Drizzle the sweetened condensed milk and the evaporated milk over the top. Bake an additional 10 minutes. Cool completely in the pan, and then cut into bars.