In mixer bowl with paddle attachment, add peanut butter, shortening, brown sugar, milk & vanilla. Beat until combined.
Add egg - beat until just blended.
Add in flour, baking soda & salt. Beat until just blended.
Fold in mini chocolate chips.
Take small ½ teaspoon size sections & roll into balls & place on ungreased cookie sheet.
Press flat with fingers. You should be able to fit close to 25-30 mini cookies on your cookie sheet & they should be no larger than 1 inch in diameter. Preferably smaller as they will spread a little when baking.
Bake 8 minutes - remove & allow to cool 1-2 minutes on baking sheet before transferring to wire rack to finish cooling.
Store in airtight container for several days.
Recipe by The 36th AVENUE at https://www.the36thavenue.com/peanut-butter-chocolate-chip-cookie-recipe/