Put the brown sugar, shortening, peanut butter, milk and vanilla into the bowl of a stand mixer. Beat on medium speed until blended. Beat in egg.
Sift flour, baking soda and salt in a small bowl until blended. Gradually add to creamed mixture, beating just until blended. Drop by rounded tablespoonfuls 2 inches apart onto a prepared cookie sheet. Flatten slightly in a crisscross pattern using tines of a fork.
Bake 7 to 8 minutes or until set and lightly browned. Cool 2 minutes on the cookie sheet. Remove to a cooling rack to cool completely.
Notes
If you like crunchy or extra crunchy peanut butter, no worries. You don't have to use creamy peanut butter, use what you have.
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