Preheat oven to 350°F
Sift salt, flour, baking powder and corn starch. Set aside.
Cream butter and sugars.
Add egg and vanilla. Mix.
Gradually add dry ingredients while mixing between each addition.
Stir in white chocolate chips, dried pineapple and macadamia nuts.
Roll into 3 Tablespoons balls (I use an ice cream scoop) on greased cookie sheet. (makes 12-14 cookies)
Bake on center oven rack 12-14 minutes or until edges are light golden brown.
Remove from oven and sprinkle cookies with salt. Cool on pan for 5 minutes.
Transfer cookies to cooling rack.