Heat your oven to 350°F (175°C) and cover a baking sheet with parchment paper.
In a big bowl, mix together the smooth peanut butter, sugar, egg, vanilla, baking soda, and salt.
Stir until all the ingredients are mixed well and the dough is soft.
Use a tablespoon or a small scoop to take some dough and shape it into small balls.
Put the dough balls on the baking sheet, leaving a 2-inch space between each one.
Softly push each ball of dough with a fork to make a pattern of intersecting lines on the top.
Cook in the oven that has been heated beforehand for 10-12 minutes, or until the edges turn slightly golden.
Take the cookies out of the oven and allow them to cool on the baking sheet for 5 minutes before moving them to a wire rack to cool down completely.
Time to prepare: 10 minutes | Time to cook: 12 minutes | Total time: 22 minutes
Each cookie has 120 calories. There are 20 cookies in total.
