Take it from the Rattmann, he knows the cake is only GLaDOS' false promise to trick you into completing the test chambers. 
 
A chocolate-slathered fabrication, a moist and buttery vanilla cake, creamy musk, and all topped off with an imaginary cherry.
 
"...But there really was a... cake..."
 
 
NOTES - DARK CHOCOLATE FROSTING, VANILLA CUPCAKE, A CHERRY ON TOP​
 
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