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)