-
Over a pot filled with 2-inches of simmering water, place a metal or glass bowl and add butter. Stir until melted halfway and add white chocolate chips. Stir until just melted and remove from heat (don’t worry if it separates); set aside.
-
Whip eggs with sugar and vanilla with electric beaters or in a mixer fitted with the whisk attachment, until pale and thick, about 5 minutes.
-
In a separate bowl, combine flour, baking powder and salt.
-
Whisk melted chocolate into egg mixture until incorporated. Whisk in flour mixture and stir in semisweet chocolate chips. Cover batter with plastic and chill for at least 4 hours before baking.
-
Preheat oven to 325°F Spoon cookie dough by tablespoonfuls (or teaspoonfuls for dainty cookies) and roll gently to shape into a ball and place on a parchment-lined or greased cookie sheet, leaving 2-inches between cookies.
-
Bake for 18-20 minutes. To test doneness, lift a cookie off the tray – if it comes off cleanly, then cookies are done.
-
For reverse double chocolate chip cookies:.
-
Prepare the same recipe as above, except replace 8 ounces of white chocolate with 10 ounces of bittersweet chocolate and increase sugar to 1 1/2 cups. Prepare remaining recipe as above and enjoy!