Peanut Butter Oatmeal Sandwich Cookies

In a large bowl, cream together 1/2 cup butter or margarine, 1/2 cup peanut butter, caster sugar, brown soft sugar and vanilla. Add egg and beat well.

In another bowl, combine the flour, bicarb, baking powder and salt. Add these dry ingredients to the creamed mixture. Stir. Add oats and stir.

Drop by teaspoons onto greased baking tray, and press each mound down with a fork to form 5mm thick cookies. Bake at 180 C / Gas 4 for 10 minutes, or until cookies are a light brown.

To Make Filling: Cream 45g butter or margarine with the icing sugar, 130g peanut butter and the cream. Spread filling onto half of the cooled cookies, then top with the other half to form sandwiches.