Preheat oven to 350F.
Combine butter, sugars, egg, peanut butter and vanilla with a mixer until well combined. With a spoon add your flour, baking soda and salt mixing until blended.
To make gems roll approx. 1/4 cup of dough into a ball. Insert wooden popsicle stick halfway into balls. On parchment lined bakng sheet press with the bottom of a glass or your palm to about 3/8 inch thick. Continue spacing approximately 1 inch apart and until baking sheet is full.
Bake for 9-12 minutes. Cool on rack. Once cooled heat up a little corn syrup. The warm corn syrup acts as glue. Use a brush to apply corn syrup to the cookies wherever you want the candy. Let dry.