Ingredients
1 cup creamy peanut butter
1/2 cup granulated sugar
1/2 cup packed light-brown sugar
1/2 cup semisweet chocolate chips
1 large egg, beaten
1 teaspoon pure vanilla extract
Preparation
Preheat oven to 350 degrees, with racks in upper and lower thirds. In a large bowl, combine all ingredients and stir with a wooden spoon until smooth. Divide dough into 24 portions, about 1 heaping tablespoon each. Roll each piece between your hands to form a smooth ball. Place dough balls, 1 inch apart, on two ungreased baking sheets. Using a fork, press on dough in two directions to form a crosshatch pattern.
Bake cookies until puffed and lightly golden, 10 to 12 minutes, rotating sheets halfway through. Let cookies cool on sheets.