Peanut Butter Cookies

Gather all ingredients and preheat the oven to 375 degrees F (190 degrees C).
Beat peanut butter, butter, white sugar, and brown sugar together in a large bowl with an electric mixer until well blended. Beat in egg until well combined. Mix in milk and vanilla. Combine flour, baking powder, and salt in a separate bowl; stir into peanut butter mixture until incorporated.
Roll tablespoonfuls of dough into balls. Place cookies 2 inches apart onto ungreased cookie sheets.
Press each ball once with fork tines.
Bake in the preheated oven until edges are lightly browned, 8 to 10 minutes.
Serve and enjoy!.