3D Model: Doughnut Mold
These doughnut molds were designed in tinkercad, but designing it in Beetlblocks is another option.
How to Prepare Files for Print
Download/export the file as an STL. Once it's been sized in Makerbot, export as an X3G. Be aware the 3D prints shrink about 3%. For these doughnut molds, use food-safe silicon.