heat oven to 375. Combine peanutbutter, shortening, brown sugar, milk, vanilla, in large bowl. Beat at medium speed of electric mixer well blended. Add egg. Beat just until blended. Combine flour, baking soda and salt. Add to creamed mixture at low speed. Mix just until blended. Drop by rounded measuring tablespoons of dough 2 inches apart onto greased baking sheet. Flatten slightly in a crisscross pattern with a fork. Bake one baking sheet at a time for 7 to 8 minutes, or until set and just beginning to brown. Cool 2 minutes on baking sheet. Remove cookies to cooling racks to cool completely. Makes 3 dozen