""I used to live in New York, and once, several years ago, I stopped by Olive's sandwich shop in SoHo with a friend," writes J-R John of Philadelphia, Pennsylvania. "After lunch I bought one of the 'cowboy cookies'; this was an extra-large and especially good chocolate chip cookie. I've never forgotten it."..."
INGREDIENTS
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2 cups all purpose flour
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2 cups old-fashioned oats
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1 teaspoon baking soda
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1/2 teaspoon baking powder
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1/2 teaspoon salt
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1 cup (2 sticks) unsalted butter, room temperature
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3/4 cup sugar
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3/4 cup plus 2 tablespoons (packed) dark brown sugar
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2 large eggs
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1 teaspoon vanilla extract
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1 1/2 cups semisweet chocolate chips
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1 cup chopped toasted walnuts (about 4 ounces)