Preheat oven to 350F. Line two baking sheets with parchment paper.
In a large bowl, combine creamy peanut butter, 1 cup of the granulated sugar, egg, vanilla, baking powder and salt and mix thoroughly.
Portion out dough into 24 pieces, about 1 tablespoon each, and roll into balls.
Dip the cookie dough balls into the remaining 1/4 cup of granulated sugar and roll until completely covered. Place on baking sheet.
Bake at 350F for 8-10 minutes, until edges are set. While the cookies are baking, unwrap 24 chocolate kisses.
Once the cookies are baked, remove from the oven and lightly press a chocolate kiss into the center of each cookie. Let cool for 5 minutes on the baking sheet before removing to a wire cooling rack to cool completely. Let the chocolate harden before serving.