Grandma Bergenholtz found this recipe on the PBS website and sent it to her.
1 cup creamy peanut butter
3/4 cup sugar
1 large egg (lightly beaten)
1/2 teaspoon baking soda
1/4 teaspoon salt
3/4 cup semisweet chocolate chips
1/2 cup roasted salted peanuts
Preheat oven to 350°, with racks in upper and lower thirds. In a large bowl, stir together peanut butter, sugar, egg, baking soda, and salt until well combined. Stir in chocolate chips and peanuts. With moistened hands, roll dough, 
about 1 heaping tablespoon at a time, into balls. Place 2 inches apart on two baking sheets. Bake until cookies are golden and puffed, 12 to 14 minutes, rotating sheets from top to bottom and front to back halfway through. Cool 5 minutes on sheets; transfer cookies to racks to cool completely.