Set a small pan over low heat. Add the macadamia nuts and toast them for about 5 minutes, tossing occasionally, until they give off a nutty aroma. Set the nuts aside to cool.
In a medium bowl, or the bowl of a mixer, cream together butter and sugars until well blended.
Add egg and egg yolk and vanilla to the bowl and mix well.
In a separate bowl mix together flour, baking soda, and salt. While mixing the wet ingredients, slowly add the flour mixture to the bowl. Continue to blend just until combined.
Add macadamia nuts and white chocolate chips (or your chosen substitutes) to the dough and fold them in until just combined.
Place dough in the fridge for 1 hour. Don't skip this step unless you want some very melted dough. About 45 minutes in to the dough chilling step, pre-heat the oven to 350°F.
Line a large cookie sheet with parchment paper. Roll dough into 2 tablespoon balls (don't skimp) and space them evenly apart on the cookie sheet.
Bake cookies for 10-12 minutes, until cookies are lightly browned on the top.
Store cookies at room temperature for 5-6 days or freeze them for about 3 months, for best quality.
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