2 cups minus 2 tablespoons cake flour*
1 2/3 cups bread flour
1 1/4 teaspoons baking soda
1 1/2 teaspoons baking powder
1 1/2 teaspoons coarse salt
2 1/2 sticks (1 1/4 cups) unsalted butter
1 1/4 cups light brown sugar
1 cup plus 2 tablespoons granulated sugar
2 large eggs
2 teaspoons pure vanilla extract
3 cups semi-sweet or bittersweet chocolate chips
1. Sift flours, baking soda, baking powder and salt into a bowl. Set aside.
2. Using a mixer fitted with paddle attachment, cream butter and sugars together until very light, about 5 minutes. Add eggs, one at a time, mixing well after each addition. Stir in the vanilla. Reduce speed to low, add dry ingredients and mix until just combined, 5 to 10 seconds. Drop chocolate chips in and stir just til combined. Press plastic wrap against dough and refrigerate for 24 to 36 hours. Dough may be used in batches, and can be refrigerated for up to 72 hours.
3. When ready to bake, preheat oven to 350 degrees. Line a baking sheet with parchment paper or a nonstick baking mat. Set aside.
4. Scoop heaping tablespoon scoops onto baking sheet. Bake until golden brown but still soft, about 12 minutes. Transfer sheet to a wire rack for 10 minutes, then slip cookies onto another rack to cool a bit more. Repeat with remaining dough, or reserve dough, refrigerated, for baking remaining batches the next day.
*If you do not have any cake flour, simply measure 1 cup of all purpose flour, remove 2 TBS. and replace with 2 TBS. cornstarch