The vanilla gulab jamun treat cake is a wonderful cake that is perfect for anyone who loves the flavors of vanilla and the Indian delicacy, the gulab jamun. It's filled with warm spiced vanilla cream, mixed with homemade cardamom, rose and pistachio-filled sugar syrup, and then layered with a soft and fluffy vanilla sponge. The sponge is topped with a sweet and tangy sugar syrup and garnished with pistachios.