Peanut Butter Cookies:
3/4 cup (170 grams) unsalted butter, room temperature
1/2 cup (105 grams) light brown sugar
1/2 cup (100 grams) caster white sugar
1 large egg
1 teaspoon pure vanilla extract
3/4 cup (185 grams) peanut butter (smooth or crunchy)
2 cups (260 grams) all purpose flour
1/2 teaspoon baking soda
1/4 teaspoon salt
Preheat oven to 350 degrees F (177 degrees C) and place rack in center of oven. Line two baking sheets with greeseproof paper.
Step 1. In the bowl of your electric mixer (or with a hand mixer), beat the butter and sugars until light and fluffy (about 2 – 3 minutes).
Step 2. Beat in the peanut butter. Add the egg and vanilla extract and beat to combine.
Step 3. In a separate bowl whisk together the flour, baking soda, and salt. Add to the peanut butter mixture and beat until incorporated. Fold in the chopped peanuts, if using. (If the batter is too soft to form into balls, place in the refrigerator for about an hour or until firm.)
Step 4. Roll the batter into 1 inch (2.5 cm) balls. Transfer the cookies to the prepared baking sheet, placing about 2 inches (5 cm) apart. Then, using the tines of the fork that has been dipped in white granulated sugar, make a crisscross pattern.
Step 5. Bake the cookies for about 10 to 12 minutes, or until the cookies are lightly browned around the edges. Remove from oven and place on a wire rack to cool. Can be stored at room temperature, in an airtight container, for about a week. Freeze for longer storage.
Makes about 35 cookies.