Preheat your oven to 190° C (375° F), line a baking sheet with parchment paper.
To a mixing bowl, add the flour and baking soda, whisk together and set aside.
In another mixing bowl, add the butter, sugar, white sugar, egg, and salt, and mix together.
Add the peanut butter and mix in.
Add the flour and mix in.
Roll dough into walnut sized balls and place on the prepared baking sheet.
Add spoon or two of sugar to a small bowl, dip the tines of a fork into the sugar and press down the ball of dough slightly, dip the tines again into the sugar and press crosswise on the dough to make a crisscross pattern. Repeat with all the balls.
Bake for 9-10 minutes or until set slightly browned on the edges and starting to crack on the top. Remove from the oven and let cool on the sheet for 10 minutes, then remove to a rack to cool completely.
After the cookies are completely cooled, place on a serving tray. Serve and enjoy.