Preparing oven: Heat your oven until it reaches 350 degrees (175degC). Place a baking sheet on parchment paper, and then set it aside.
Mixing Ingredients In a large mixing bowl mix peanut butter and sugar. Mix until it becomes creamy. Add the baking soda and egg and mix until all the ingredients are blended and smooth.
For Cookies: Utilizing a medium-sized cookie scoop or a tablespoon portion the dough out and then roll it into balls. Place the dough balls on the baking sheet you've prepared. Make use of a fork to press the dough to the sheet to form a crisscross for each one.
Bake Bake the cookies in the heated oven for 9-10 minutes and until cookies are firm on the edges. Be cautious not to overbake because cookies will continue to get firmer when they cool.
Cool Cookies to rest on a baking tray for 3-4 mins before moving them onto an air-tight rack to completely cool.
Notes
Enjoy your delicious, flourless peanut butter cookies!