peanut butter cookies

Ingredients
1/2 cup brown sugar
1/2 cup white sugar
1/2 stick butter
1 egg
1/2 tsp vanilla
1 cup peanut butter
1/2 tsp salt
1/2 tsp bicarbonate of soda
1 3/4 cup flour
Instructions
1. Cream up butter with sugar , egg and vanilla.
2. Add peanut butter and cream again. Then add remain ingredients and knead to a soft dough.
3. Shape into small balls and flatten it with a folk. Place cookies apart on a greased tray.
4. Bake in preheated moderate oven for 15 mins.
5. Store in cookie jar when cool.