Custard bursts are pink and purple square puffs that look like marshmallows but are hard like candy on the outside with goo on the inside. They come in different flavors including chocolate, chocolate-cherry, butterscotch, lushberry, and caramel.
They used to be Jolie's favorite pastries. Edaline likes making them for Sophie, and they are probably Sophie's favorite dessert besides Mallowmelt. Shannon Messenger says that she based them on french macarons.