Preheat oven to 325 degrees F and line two baking sheet with parchment paper or a silpat
Add almond flour (115 grams), powdered sugar (200 grams) and ground oreo cookies to the bowl of a food processor; turn the food processor on for one minute
Sift the almond flour, powdered sugar mixture into a large bowl; set aside
In a mixer with whisk attachment, whisk egg whites and egg white powder until stiff peaks
Slowly add in powdered sugar (30 grams) to egg whites
Remove the bowl from the mixer and fold in powdered sugar, almond flour and oreo mixture
Fold until smooth and can make ribbons with batter (do not over mix)
Transfer the batter into a piping bag and pipe 1.5” round about an inch apart onto a sheet pan lined with parchment paper or a silpat
Let the macarons sit on the sheet pan for 20 minutes before baking
Bake for 12 minutes
Remove the macarons from the oven and allow to cool before filling
Make the filling of your choice while the macarons are cooling (the filling can also be made in advance)
Fill half of the macaron shells with filling of choice and then stack the other half of the cookies on top
Enjoy immediately or store in an airtight container in the refrigerator for 24-48 hours