Preheat oven to 350 degrees F (175 degrees C). Grease cookie sheets.
2.
In a medium bowl, stir peanut butter and sugar together until smooth. Beat in the eggs, one at a time, then stir in the baking soda, salt, and vanilla. Roll dough into 1 inch balls and place them 2 inches apart onto the prepared cookie sheets. Press a criss-cross into the top using the back of a fork.
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