This cake was 3D printed using seven simple ingredients blended into pastes. The result was a layered flavour that "hits you in different waves", says Jonathan Blutinger at Columbia University in New York. Blutinger and his colleagues grabbed seven ingredients from local grocery stores: graham crackers, peanut butter, strawberry jam, Nutella, banana puree, cherry syrup and frosting. They put anything not already in a paste form into a food processor.
That allowed a 3D printer to build up the cake by depositing the seven paste-like food ingredients in layers – a process resembling how people might squeeze out a tube of frosting.
Footage: Jonathan Blutinger / Columbia Engineering
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