You always have the choice to experience our sites without personalised advertising based on your web browsing activity by visiting the , the , and/or the , from each of your browsers or devices. To avoid personalised advertising based on your mobile app activity, you can install the . You can find much more information about your privacy choices in . Even if you choose not to have your activity tracked by third parties for advertising services, you will still see non-personalised ads on our site.. In a large bowl (or electric mixer) cream together butter, sugar and finally the egg. In another bowl, combine cocoa, flour, bicarb and salt. In another bowl, combine cocoa, flour, bicarb and salt. Add the dry ingredients to the mixture, add the milk, vanilla and soured cream mixture; beat until smooth.. Fall in love with this easy recipe for whoopie pies. Two light discs of chocolate sponge sandwich a fluffy vanilla buttercream filling. Perfect for cake sales, packed lunch treats or making friends at the office!.