Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the peanut butter and sugar.
Add the egg and mix until smooth.
Stir in the vanilla extract, baking soda, and salt.
Scoop the dough onto a lined baking sheet.
Flatten each cookie slightly with a fork.
Bake for 10-12 minutes until edges are lightly golden.
Remove from oven and let cool on the baking sheet.
Transfer cookies to a wire rack to cool completely.
Enjoy your delicious peanut butter cookies!