Pumpkin Spice Everything adds Pumpkin spice, made with sugar and pumpkins. 

Pumpkin Spice can be applied to all vanilla food items (even Rotten Flesh!) to provide a small hunger bonus

You can make Pumpkin Spice Lattes with milk, pumpkin spice, and a bottle, which provides decent hunger and 5 seconds of saturation.

(Somewhat parodying the Pumpkin Spice trend)