In a large bowl combine peanut butter, sugar and egg. Mix well.
Use a spoon or small cookie scoop to scoop batter and roll by hand into balls. Place balls of cookie dough on cookie sheet lined with parchment paper evenly and press down on each cookie lightly with a fork to flatten.
Bake for 10-12 minutes until the edges of the cookies turn slightly golden. Remove from oven and let stand for 5 minute2. Remove with a spatula to a cooling rack and let cool completely.
Store in an airtight container. Variations/Add-Ins: Dress these cookies up by adding in a 1/2 cup of: