My Favorite Peanut Butter Cookies

Ingredients
1/2 cup of butter
1/2 cup peanut butter
1/2 cup of sugar
1/2 cup brown sugar
1 egg
1/2 teaspoon vanilla
1 1/4 cups sifted flour
3/4 teaspoon baking soda
1/4 teaspoon of salt

Instructions
Preheat the oven to 375? Mix the first six ingredients.
Add the rest of the ingredients. Mix well.
Roll into balls and press with a fork dipped in sugar or flour.
Bake for 12 to 15 minutes in the preheated oven until lightly browned.
Allow the cookies to cool on a baking sheet for 5 minutes before placing them on a rack to cool completely.