Preheat your oven to 350°F (175°C).
In a large bowl, combine the peanut butter and sugar until smooth.
Add the egg and vanilla extract, mixing well.
Stir in the baking soda and salt until fully incorporated.
Scoop out the dough and roll into balls.
Place the dough balls on a baking sheet lined with parchment paper.
Flatten each ball slightly with a fork, creating a crisscross pattern.
Bake in the preheated oven for 10-12 minutes or until lightly golden.
Remove from the oven and let cool on the baking sheet for 5 minutes.
Transfer to a wire rack to cool completely.