Preheat the oven to 350F°. Line a baking sheet with parchment paper.
Cream the melted butter and sugar together. Add the flax eggs or 2 eggs yolks and mix until combined.
Mix in the baking soda, salt, and vanilla extract.
Sift in the gluten free flour and gently mix until you have a smooth dough.
Mix in the white chocolate chips, macadamia nuts pieces & the chopped white chocolate bar.
Form 2 tablespoon-size balls and place the cookies 3 inches apart on the baking sheet.
Roll each cookie dough ball in additional white chocolate chips and toasted macadamia nut pieces.
Gently press 1-2 white chocolate bar chunks into the top of each cookie.
Cover and chill the cookies directly on the baking sheet for 2 hours in the fridge.
Bake for 10-12 minutes. The cookies will spread and lose their doughy shine on top and be golden on the bottom, but will still be soft.
Sprinkle with flaky sea salt directly out of the oven and let the cookies set as they cool.
After 15 minutes, once the cookies firm up, transfer the cookies to a cooling rack. Enjoy!