The Brew of Frost is a throwable potion that explodes into an icy block when it hits anything. If a creature or player is hit, they will be encased in ice. If the ground is hit, a wall of ice will form. If water is hit, it will freeze. Certain creatures hit by the brew may cause unexpected effects.

The Brew of Frost is created in a kettle using the recipe found in the book Witchcraft: Brews & Infusions. Into the pot, throw an Icy Needle, Glistering Melon, Snowball, Red Mushroom, Water Artichoke Globe and Odour of Purity.

Wear a Witches Hat (and robes) while brewing to get a chance of double brewing.