Preheat oven to 375 degrees F.
In a large bowl, cream butter or shortening and peanut butter until light and fluffy. Gradually add 1/2 cup granulated sugar and brown sugar; beating until light and fluffy. Add egg, milk, and vanilla extract; beat well. Add flour, baking soda, and salt; stir into creamed mixture until well mixed.
Roll cookie dough into 1-inch balls; roll balls in the remaining 1/4 cup sugar. Place balls, 2 inches apart, onto ungreased cookie sheets.
There are two popular ways to cook these cookies. Take your pick:
Bake 8 minutes. Remove from oven; press a chocolate kiss candy into the center of each cookie. Return to oven and bake another 2 minutes or until cookies are light brown. Remove from oven and remove from cookie sheet; let cookies cool on wire cooling racks.
Bake 8 to 10 minutes or until lightly browned. Remove from oven and immediately press a chocolate kiss into the center of each cookie (cookie will crack around edges). Remove from cookie sheet and let cookies cool on wire cooling racks.
Peanut Blossom Cookies Recipe: https://whatscookingamerica.net/cookie/peanutbutterchockiss.htm