The car tyres are made with chocolate shells and filled with cookies n cream swiss meringue buttercream. The McQueens are strawberry flavoured shells with strawberry swiss meringue buttercream. You may refer to the recipe from my Mickey and Minnie macaron post for the recipe for the car tyres, and my Mickey Mouse gloves and pants macaron post for the recipe for McQueen. I froze the McQueen shells which I made at the same time as the Mickey pants to help to save time. Just place baking sheets between layers of shells and store in airtight container in the freezer. Bring the shells to room temperature before opening the container. Don't worry, the quality of the shells are not compromised by freezing :). Macarons freeze very well.
Just to share some pictures of the process...
Piping out McQueen shells. Use a Wilton #12 round tip for this
Freshly baked McQueen shells!
The car tyres are just plain round macarons but with the tyre features added on with royal icing. I used two circle cookie cutters to print on concentric circles with royal icing as guides for me while I iced by piping using a Wilton #2 tip.
Freshly iced car tyres! Mostly done by freehand!
Icing McQueen was more challenging as there are a lot more details to add. I did all of it by freehand, using the shape of the macaron shell as a guide for each feature. Most of it was painted on with a toothpick. Thankfully I only made 6 of these! You may use a plastic template to trace out the features like I always do for cookies with complex designs. But you have to be very careful not to let the marker ink smudge as the macaron shell is not going to be fully flooded by icing to cover up the smudges.
Freshly iced McQueen!
Filling up with strawberry swiss meringue buttercream
Filling up with cookies n cream filling
Refrigerate in airtight container for at least 24h before serving.