Oreos are one of the most popular (and tastiest) cookies. Did you know that you can make them yourself? It's easy and fun! You'll end up with 60 cookies (=30 sandwich cookies).
Cream the butter and sugars together. Add the egg and mix until fully incorporated. Add the flour and cocoa powder to the mixture, mixing until a firm cookie dough forms.
Form two slabs of dough and wrap them in foil. Read here for an easy method.
Let the dough rest in the fridge for an hour.
After cooling, roll the dough out to 1/2 cm thickness on a surface sprinkled with cocoa powder. Cut out 60 circles, each 5 cm (2 inch) in diameter, and place them on a baking sheet lined with parchment paper.
Bake the cookies for 10-12 minutes at 180˚C/350°F with conventional oven.
Allow the cookies to cool on the baking sheet, then transfer them to a wire rack to cool completely.
For the filling, mix the butter with the powdered sugar. Once the powdered sugar begins to blend with the butter, add the whipping cream and vanilla. Continue mixing until you have a smooth, firm cream.
Fill a piping bag with the buttercream and pipe a small dollop of filling onto 30 cookies. Place the remaining 30 unfilled cookies on top and press down until the filling is pushed out.
How to store
These cookies can be stored in a sealed container or tin in a cool, dark place for one to two weeks. Do not store them in the refrigerator, as this will affect their taste. They will keep in the freezer for up to three months.