Bake the Book: Ultrathin Chocolate Chunk Cookies

Preheat the oven to 325°F. Position racks in the upper and lower thirds of the oven.

Combine the flour and baking soda in a small bowl and mix together thoroughly with a whisk or fork.

In a large bowl, whisk together the melted butter, oats, sugars, corn syrup, milk, and salt.

Mix in the flour mixture. If the batter is warm from the butter, let it cool before adding the chocolate. Stir in the chocolate chunks. If possible, let the dough rest for at least several hours at room temperature or (better still) overnight in the fridge. The rest makes for an especially crisp and extra-flavorful cookie!

Divide the dough into 15 equal pieces.

Lay out 3 sheets of aluminum foil, cut to fit your cookie sheets, on the counter. Arrange 5 pieces of dough (4 in a square and 1 in the center) well apart on each sheet of foil, remembering that the cookies will spread to 5 inches. Flatten each piece of dough until it is about 3 1/2 inches in diameter. Slide two of the sheets onto baking sheets.

Bake for 20 to 25 minutes, until the cookies are thin and very brown. If they are too pale, they will not be crisp. Rotate the pans from top to bottom and front to back halfway through the baking time to ensure even baking. Slide the foil with cookies onto racks to cool completely before removing the cookies from the foil. Repeat with the third batch—you can even slide the next foil and cookie dough onto a hot baking sheet as long as you put the pan in the oven immediately. Cool the cookies completely before stacking or storing. May be kept in an airtight container for at least 3 days.