These macaron replicas unscrew to reveal a tiny gift (candy, coins, folded money, jewelry, etc.).  I made them in two sizes, 40mm and 50mm, or 1¾ and 2 inches.  I also made boxes that hold five macarons on edge.

I modeled these in Autodesk Fusion 360.  I've included the CAD files in .f3d and .STEP formats for easy remixing.

Bon appetit! 

How to Print

For each macaron, print one filling and two cookies.

For best appearance, use several tricks for the cookies.  These are the instructions for PrusaSlicer; other slicers have similar controls.

• Smaller nozzle is better; the ones in the photo used a 0.4mm nozzle.

• Matte filament works well; the macarons in the photo are PolyMaker PolyTerra PLA.

• Select variable layer height and click "Adaptive" to automatically create a layer gradation.

• Paint fuzzy skin on the broken dough edge of the cookie.  Use coarse fuzzy skin settings.  I used 0.8mm point distance and 0.6mm thickness.  Using PrusaSlicer's "smart fill" option, you can fill the area with a single click.

• Paint supports onto the 15 small dots on the underside of the cookie.  Those dots support the rest of the underside.  (Use "smart fill" again.)

• Set the infill bridging angle to 1° to make the bridges short.  (PrusaSlicer won't let you set 0°; 1° is close enough.)

I've enclosed a .3mf file with all these settings for a Prusa MK4S.  It has one 40mm and one 50mm macaron; delete the one you don't want.  It should work with other Prusa printers simply by changing the target printer.

The filling doesn't require any special print settings.  Matte PLA looks good for the filling, too.