I've tried a lot of whoopie pie recipes and this is the best one I have found. I will be using it from now on. The cookie part took 8 minutes to cook just as the reci I will be using it from now on.. 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!. Chocolate whoopie pies are an American favourite that you can now create at home with this easy to follow, delicious and simple recipe from Jamie Oliver.. Heat oven to 180C/160C fan/gas 4 and line baking trays with parchment. Mix flour, cocoa, bicarb, sugar and a pinch of salt. Whisk the egg, oil and buttermilk together, then mix into dry ingredients with 75ml boiling water.. Add in brown sugar, baking soda, apple pie spice & salt. Beat on medium speed until well incorporated. Add egg and beat until combined. Add in applesauce & milk and mix on low speed until fully incorporated. Add in flour a little at a time and mix until combined. Add apple and fold into mixture with spatula.. 8/31/2009 Classic whoopie pie! The only thing I changed was omitting the egg whites from the filling and adding about 2 Tb. of milk and an extra 1/4 cup of powdered sugar..