Vanilla pumpkin spice bath bomb You will need: 1c. Baking soda, 1/2c. cornstarch, citric acid, Epsom salt, 1tblsp. pumpkin spice, 3/4tsp. water, 2&1/2tsp. coconut oil, and 2tsp. Vanilla extract. Combine baking soda, cornstarch, citric acid, Epsom salt and spice. In a separate bowl combine water, oil, and vanilla. Then slowly add liquid to dry until wet sand consistency. Pack in molds and leave to dry for 1-2 days. Tap sides with a spoon to loosen from mold. Hope you enjoy!