01 - 
                Heat oven to 350°F. Line baking sheet with parchment.
              
              
              
                02 - 
                Mix peanut butter, sugar, egg, and vanilla until smooth.
              
              
              
                03 - 
                Form dough balls, place on sheet, press with fork in crisscross pattern.
              
              
              
                04 - 
                Bake 10-12 minutes until edges brown. Cool fully.
              
              
              
                05 - 
                Beat butter with brown sugar until smooth. Mix in powdered sugar and cream until fluffy.
              
              
              
                06 - 
                Spread filling on one cookie, top with another.