Choc chip cookies

This is the most interesting chocolate chip cookie recipe I've ever seen. Try it and tell me what you think!

1/2 cup unsalted butter
2 1/4 cups all-purpose flour
3/4 teaspoon baking soda
1 teaspoon active dry yeast
3/4 teaspoon flaky sea salt (scant)
1/4 cup coconut oil
3/4 cup firmly packed brown sugar
1/2 cup granulated sugar
1 large egg
2 teaspoons vanilla extract
1 1/2 cups dark chocolate chips (Ghiradelli!)
3/4 cup coarsely chopped walnuts, toasted

Melt butter in a small saucepan over medium heat; continue to cook the butter, whisking frequently, until it starts to brown and foam, about 2-3 minutes. Set aside.

In a medium sized mixing bowl, sift together flour and baking soda; stir in yeast and salt until combined.

In a large mixing bowl, using a mixer on medium speed, beat browned butter, coconut oil, brown sugar and granulated sugar until well combined and grainy, about 1 minute. Beat in egg and vanilla until well combined. Reduce mixer speed to low and gradually beat in flour mixture until just combined; stir in chocolate chips and walnuts with a wooden spoon, until combined. Chill dough in the refrigerator for 30 minutes.

Preheat oven to 375 degrees F. Generously butter a cookie sheet.

Drop 1/4 cup measures of dough onto cookie sheet, forming into large mounds, and bake at 375 degrees F, for 12-14 minutes, or until golden.
Cool for 2 minutes before transferring to wire racks.

Makes 16 large cookies