Preheat oven to 350º and line two baking sheets with parchment paper.
Cream peanut butter together with sugar(s) until fully incorporated.
Add egg, soda, vanilla, and salt. Beat until smooth.
With a 1 ½ Tbsp scoop (1 oz), measure and transfer balls of dough to cookie sheet. Leave 2 to 3 inches of space - that is 8 dough balls on each sheet.