1. Adjust 2 oven racks to upper and lower positions; preheat oven to 375°. Line 2 rimmed baking pans with parchment paper. In large bowl, stir peanut butter, flour, sugar, baking powder and 1/2 teaspoon salt. Using 2 small spoons, drop dough into 1 tablespoon mounds, 1 inch apart, on prepared pans; roll into balls and press 1 peanut into top of each ball.
2. In small bowl, whisk egg; brush over dough balls and bake 15 minutes or until golden brown and set, turning pans and rotating pans between upper and lower racks h alfway through baking. Cool cookies on pans 10 minutes; transfer cookies to wire rack to cool completely. Makes 24 cookies

Approximate nutritional values per serving (1 cookie): 111 Calories, 7g Fat, 1g Saturated Fat, 4mg Cholesterol, 135mg Sodium, 9g C arbohydrates, 1g Fiber, 4g Sugars, 3g Added Sugars, 4g Protein