Peanut butter cookies recipe - no sugar added

1 cup peanut butter
1 cup sugar substitute
1 egg
1 teaspoon vanilla

Mix all ingredients, drop by teaspoons onto cookie sheet, and bake at 175 degrees Celsius for 12 minutes or until set.

Source: http://www.food.com/recipe/low-carb-peanut-butter-cookies-67015?oc=linkback

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Flourless, Sugar-Free Peanut Butter Cookies
(Makes about 2 dozen small cookies, recipe adapted from Flourless Peanut Butter Cookies from Cookie Madness.)

Ingredients:
1 large egg
1 cup granular Splenda or Stevia-in-the-Raw Granulated Sweetener
1 tsp. baking powder
1/2 tsp. Mexican vanilla (or vanilla extract)
1 cup creamy natural peanut butter (check sugar content, the one I used had only 1 gram sugar per serving)
1 tsp. water
1/3 cup chopped peanuts (optional)

Details: http://www.kalynskitchen.com/2007/10/recipe-for-flourless-sugar-free-peanut.html#sthash.bA3TWF3W.dpuf