1 cup peanut butter (I like the chunky style)
1 cup sugar
1 egg
1/2 teaspoon vanilla extract

Mix peanut butter and sugar, then stir in remaining ingredients. Shape in balls and put on ungreased cookie sheets.  Press with fork to flatten lightly and bake in moderate oven at 350 degrees 12 to 15 minutes.  Makes about 3 dozen. 

Note: There is no flour in this recipe!