Preheat oven to 350
Mix wet ingredients- butter, banana, vanilla, and egg
Mix dry ingredients- flour, baking powder, salt
Add white chocolate chips and macadamia nuts
Line a baking sheet with parchment paper
Scoop a 1.5-inch amount of dough onto the baking sheet. Keep the cookies 1-2 inches apart. Press down on each cookie with a fork
Bake in the oven for 10-12 minutes.
Remove from oven, cool, and serve.